Quarter	Percent
1966-07-01	1.60000000000000
1966-10-01	1.50000000000000
1967-01-01	2.20000000000000
1967-04-01	2.00000000000000
1967-07-01	1.70000000000000
1967-10-01	1.60000000000000
1968-01-01	2.20000000000000
1968-04-01	2.00000000000000
1968-07-01	1.60000000000000
1968-10-01	1.60000000000000
1969-01-01	2.10000000000000
1969-04-01	1.80000000000000
1969-07-01	1.50000000000000
1969-10-01	1.80000000000000
1970-01-01	1.90000000000000
1970-04-01	1.70000000000000
1970-07-01	1.40000000000000
1970-10-01	1.50000000000000
1971-01-01	2.10000000000000
1971-04-01	1.90000000000000
1971-07-01	1.70000000000000
1971-10-01	2.00000000000000
1972-01-01	2.90000000000000
1972-04-01	2.40000000000000
1972-07-01	2.50000000000000
1972-10-01	2.70000000000000
1973-01-01	3.10000000000000
1973-04-01	2.30000000000000
1973-07-01	1.80000000000000
1973-10-01	2.10000000000000
1974-01-01	2.60000000000000
1974-04-01	2.10000000000000
1974-07-01	2.40000000000000
1974-10-01	3.70000000000000
1975-01-01	5.40000000000000
1975-04-01	4.70000000000000
1975-07-01	4.60000000000000
1975-10-01	5.00000000000000
1976-01-01	5.40000000000000
1976-04-01	4.40000000000000
1976-07-01	4.70000000000000
1976-10-01	4.50000000000000
1977-01-01	5.90000000000000
1977-04-01	5.50000000000000
1977-07-01	5.70000000000000
1977-10-01	5.50000000000000
1978-01-01	7.40000000000000
1978-04-01	6.18691113333333
1978-07-01	6.06371276666667
1978-10-01	6.11950863333333
1979-01-01	6.87004616666667
1979-04-01	6.23229910000000
1979-07-01	5.97219673333333
1979-10-01	5.98745493333333
1980-01-01	6.56208046666667
1980-04-01	6.16876460000000
1980-07-01	5.90539926666667
1980-10-01	5.78873716666667
1981-01-01	6.27788986666667
1981-04-01	5.46219926666667
1981-07-01	5.62978756666667
1981-10-01	5.76440690000000
1982-01-01	6.75154230000000
1982-04-01	6.52094040000000
1982-07-01	6.88566196666667
1982-10-01	8.46638290000000
1983-01-01	10.40945060000000
1983-04-01	10.14955920000000
1983-07-01	9.97980516666666
1983-10-01	9.30755786666667
1984-01-01	10.12905276666670
1984-04-01	9.07796796666667
1984-07-01	8.50533056666666
1984-10-01	8.24637020000000
1985-01-01	9.23393306666667
1985-04-01	8.42788806666666
1985-07-01	7.88549343333333
1985-10-01	7.50463066666667
1986-01-01	8.58561803333334
1986-04-01	7.76598766666667
1986-07-01	8.01906400000000
1986-10-01	7.95348516666667
1987-01-01	8.96197346666666
1987-04-01	8.13618403333333
1987-07-01	7.77924090000000
1987-10-01	7.55476010000000
1988-01-01	8.15343030000000
1988-04-01	7.55089316666667
1988-07-01	6.75780920000000
1988-10-01	6.44968453333333
1989-01-01	7.12654363333333
1989-04-01	6.12622480000000
1989-07-01	5.85912926666667
1989-10-01	5.60740413333333
1990-01-01	6.73920070000000
1990-04-01	6.40401086666667
1990-07-01	6.99128526666667
1990-10-01	7.55750330000000
1991-01-01	9.38582810000000
1991-04-01	9.45442230000000
1991-07-01	9.64948266666666
1991-10-01	9.81635456666666
1992-01-01	11.18509953333330
1992-04-01	10.51041400000000
1992-07-01	10.51374766666670
1992-10-01	10.70328076666670
1993-01-01	11.70567066666670
1993-04-01	10.74568000000000
1993-07-01	10.58914440000000
1993-10-01	10.45816600000000
1994-01-01	11.22225543333330
1994-04-01	9.76321573333333
1994-07-01	9.21450463333334
1994-10-01	8.68878523333333
1995-01-01	9.44843200000000
1995-04-01	8.26716116666667
1995-07-01	8.12584993333333
1995-10-01	8.04768280000000
1996-01-01	9.04838113333334
1996-04-01	8.34800680000000
1996-07-01	8.35362353333334
1996-10-01	8.27444466666667
1997-01-01	9.27713386666667
1997-04-01	8.40279653333333
1997-07-01	8.12534643333334
1997-10-01	7.64467266666667
1998-01-01	8.43678153333333
1998-04-01	7.66544280000000
1998-07-01	7.54370313333333
1998-10-01	7.06379020000000
1999-01-01	7.63965753333333
1999-04-01	6.83965543333333
1999-07-01	6.66640626666667
1999-10-01	6.34944623333333
2000-01-01	7.17784523333333
2000-04-01	6.26926666666667
2000-07-01	5.79239260000000
2000-10-01	5.90268033333333
2001-01-01	6.88729326666667
2001-04-01	6.81846433333333
2001-07-01	6.61310053333333
2001-10-01	6.64983403333333
2002-01-01	7.21087040000000
2002-04-01	6.36700313333333
2002-07-01	6.04531296666667
2002-10-01	5.85245883333333
2003-01-01	6.59811273333333
2003-04-01	6.02397723333333
2003-07-01	5.66976273333333
2003-10-01	5.42182846666667
2004-01-01	6.04301116666667
2004-04-01	5.41658330000000
2004-07-01	5.26058756666667
2004-10-01	4.86675216666667
2005-01-01	5.58083230000000
2005-04-01	5.04463523333333
2005-07-01	4.75601130000000
2005-10-01	4.75404413333333
2006-01-01	5.51164183333333
2006-04-01	4.84868483333333
2006-07-01	4.48641916666667
2006-10-01	4.29421306666667
2007-01-01	4.98138090000000
2007-04-01	4.31562783333333
2007-07-01	4.08105710000000
2007-10-01	4.13854020000000
2008-01-01	4.45390353333333
2008-04-01	4.24562140000000
2008-07-01	4.01888146666667
2008-10-01	4.21891243333333
2009-01-01	5.77632450000000
2009-04-01	5.71045250000000
2009-07-01	5.46324573333333
2009-10-01	5.29151900000000
2010-01-01	5.80579930000000
2010-04-01	5.26185436666667
2010-07-01	4.93929770000000
2010-10-01	4.84641040000000
2011-01-01	5.41319013333333
2011-04-01	4.92913833333333
2011-07-01	5.01925113333333
2011-10-01	4.96384040000000
2012-01-01	5.60215643333333
2012-04-01	5.06895593333333
2012-07-01	5.10759223333333
2012-10-01	5.11868990000000
2013-01-01	5.95605703333333
2013-04-01	5.57193610000000
2013-07-01	5.55445313333333
2013-10-01	5.56977720000000
2014-01-01	6.47545126666667
2014-04-01	5.85211480000000
2014-07-01	6.02805093333333
2014-10-01	5.95973306666667
2015-01-01	6.64867690000000
2015-04-01	5.93892530000000
2015-07-01	6.09141390000000
2015-10-01	5.55276823333333
2016-01-01	6.22059186666667
2016-04-01	5.61285836666667
2016-07-01	5.56692490000000
2016-10-01	5.44414400000000
2017-01-01	6.23667770000000
2017-04-01	5.51596406666667
2017-07-01	5.44295603333333
2017-10-01	5.19010456666667
2018-01-01	5.96059480000000
2018-04-01	5.34948910000000
2018-07-01	5.11155723333333