Year	Units
1960-01-01	1059074.166666670
1961-01-01	1271296.333333330
1962-01-01	977777.750000000
1963-01-01	959814.916666666
1964-01-01	1051759.333333330
1965-01-01	1346481.500000000
1966-01-01	966944.416666666
1967-01-01	1155463.000000000
1968-01-01	1284259.250000000
1969-01-01	1489259.166666670
1970-01-01	1621296.333333330
1971-01-01	1717963.166666670
1972-01-01	1670555.500000000
1973-01-01	1639444.500000000
1974-01-01	1712777.833333330
1975-01-01	1719722.416666670
1976-01-01	1670555.500000000
1977-01-01	1637222.333333330
1978-01-01	1661666.583333330
1979-01-01	1619444.500000000
1980-01-01	1473055.500000000
1981-01-01	1511944.583333330
1982-01-01	1548888.916666670
1983-01-01	1556388.750000000
1984-01-01	1409444.416666670
1985-01-01	1296481.416666670
1986-01-01	1324231.833333330
1987-01-01	1749693.583333330
1988-01-01	2146707.500000000
1989-01-01	1675712.666666670
1990-01-01	1654122.282671850
1991-01-01	1348730.737689360
1992-01-01	986700.270461429
1993-01-01	856615.987735057
1994-01-01	762989.298468981
1995-01-01	598235.973208602
1996-01-01	769501.723591366
1997-01-01	984399.822077002
1998-01-01	1081869.667992590
1999-01-01	1240520.533702620
2000-01-01	1169538.806843550
2001-01-01	998422.592850630
2002-01-01	1061145.089718970
2003-01-01	1240980.169053430
2004-01-01	1258985.426661910
2005-01-01	1367589.713012230
2006-01-01	1360566.679498510
2007-01-01	1226674.141447460
2008-01-01	963351.535928780
2009-01-01	942425.725200535
2010-01-01	1220209.891730820
2011-01-01	1191187.320044210
2012-01-01	1089681.791152570
2013-01-01	899980.570790872
2014-01-01	913838.065908569