Quarter	Percent
1975-03-31	10.8934
1975-06-30	9.7234
1975-09-30	9.8019
1975-12-31	10.9453
1976-03-31	9.9063
1976-06-30	9.9556
1976-09-30	10.8
1976-12-31	13.7617
1977-03-31	12.2024
1977-06-30	8.7869
1977-09-30	7.9923
1977-12-31	6.5526
1978-03-31	6.5454
1978-06-30	8.4127
1978-09-30	10
1978-12-31	11.4107
1979-03-31	12.8711
1979-06-30	12.4262
1979-09-30	14
1979-12-31	15.3887
1980-03-31	17
1980-06-30	17
1980-09-30	16.0538
1980-12-31	15.2188
1981-03-31	13.5317
1981-06-30	12
1981-09-30	12.3438
1981-12-31	15.1426
1982-03-31	13.8095
1982-06-30	12.8607
1982-09-30	11.3231
1982-12-31	9.6826
1983-03-31	10.8095
1983-06-30	9.9672
1983-09-30	9.5
1983-12-31	9.0079
1984-03-31	8.9121
1984-06-30	8.9016
1984-09-30	10.9189
1984-12-31	10.0371
1985-03-31	13.0685
1985-06-30	12.6803
1985-09-30	11.7365
1985-12-31	11.5
1986-03-31	12.3033
1986-06-30	10.4504
1986-09-30	10
1986-12-31	10.8516
1987-03-31	10.7976
1987-06-30	9.3504
1987-09-30	9.5885
1987-12-31	9.1836
1988-03-31	8.752
1988-06-30	8.1721
1988-09-30	11.0981
1988-12-31	12.381
1989-03-31	13
1989-06-30	13.4286
1989-09-30	14
1989-12-31	14.9524
1990-03-31	15
1990-06-30	15
1990-09-30	15
1990-12-31	14.0781
1991-03-31	13.5242
1991-06-30	11.8629
1991-09-30	10.9231
1991-12-31	10.5
1992-03-31	10.5
1992-06-30	10.1721
1992-09-30	9.9308
1992-12-31	7.6602
1993-03-31	6.254
1993-06-30	6
1993-09-30	6
1993-12-31	5.7891
1994-03-31	5.3492
1994-06-30	5.25
1994-09-30	5.3654
1994-12-31	5.877
1995-03-31	6.5762
1995-06-30	6.75
1995-09-30	6.75
1995-12-31	6.7063
1996-03-31	6.2344
1996-06-30	5.9303
1996-09-30	5.75
1996-12-31	5.917
1997-03-31	6
1997-06-30	6.2212
1997-09-30	6.8692
1997-12-31	7.1484
1998-03-31	7.25
1998-06-30	7.3279
1998-09-30	7.5
1998-12-31	6.8633
1999-03-31	5.6944
1999-06-30	5.2008
1999-09-30	5.0635
1999-12-31	5.4048
2000-03-31	5.8633
2000-06-30	6
2000-09-30	6
2000-12-31	6
2001-03-31	5.8555
2001-06-30	5.3648
2001-09-30	5.0547
2001-12-31	4.2305
2002-03-31	4
2002-06-30	4
2002-09-30	4
2002-12-31	4
2003-03-31	3.8532
2003-06-30	3.75
2003-09-30	3.5308
2003-12-31	3.6484
2004-03-31	3.9063
2004-06-30	4.2172
2004-09-30	4.6538
2004-12-31	4.75
2005-03-31	4.75
2005-06-30	4.75
2005-09-30	4.5923
2005-12-31	4.5
2006-03-31	4.5
2006-06-30	4.5
2006-09-30	4.6602
2006-12-31	4.8889
2007-03-31	5.2227
2007-06-30	5.3975
2007-09-30	5.7383
2007-12-31	5.6875
2008-03-31	5.3548
2008-06-30	5.0278
2008-09-30	5
2008-12-31	3.3672
2009-03-31	1.0714
2009-06-30	0.5
2009-09-30	0.5
2009-12-31	0.5
2010-03-31	0.5
2010-06-30	0.5
2010-09-30	0.5
2010-12-31	0.5
2011-03-31	0.5
2011-06-30	0.5
2011-09-30	0.5
2011-12-31	0.5
2012-03-31	0.5
2012-06-30	0.5
2012-09-30	0.5
2012-12-31	0.5
2013-03-31	0.5
2013-06-30	0.5
2013-09-30	0.5
2013-12-31	0.5
2014-03-31	0.5
2014-06-30	0.5
2014-09-30	0.5
2014-12-31	0.5
2015-03-31	0.5
2015-06-30	0.5