Year	Units
1960-01-01	4109.46746023392
1961-01-01	5652.70521065248
1962-01-01	6787.23682093794
1963-01-01	7474.13789679190
1964-01-01	10368.93528789070
1965-01-01	13025.77052056870
1966-01-01	20497.45519923260
1967-01-01	23716.07738323400
1968-01-01	25340.10778400300
1969-01-01	30884.38075339570
1970-01-01	32645.79136933550
1971-01-01	35413.83915715170
1972-01-01	41434.85418276210
1973-01-01	48668.57670300510
1974-01-01	47078.07361665280
1975-01-01	46790.06580841970
1976-01-01	50673.42833118510
1977-01-01	54204.59050470000
1978-01-01	53482.85373142780
1979-01-01	50753.15792034670
1980-01-01	46950.42450005660
1981-01-01	41363.05666554790
1982-01-01	43811.45013127920
1983-01-01	45005.75848995150
1984-01-01	42704.72165977830
1985-01-01	47024.18459177330
1986-01-01	56348.45782680280
1987-01-01	75882.12539746220
1988-01-01	88654.06961571540
1989-01-01	93963.81493206650
1990-01-01	82347.50000000000
1991-01-01	73915.25000000000
1992-01-01	81837.00000000000
1993-01-01	61991.75000000000
1994-01-01	75806.83333333330
1995-01-01	69530.75000000000
1996-01-01	75910.66666666670
1997-01-01	84698.58333333330
1998-01-01	99377.50000000000
1999-01-01	117187.16666666700
2000-01-01	115104.66666666700
2001-01-01	118797.75000000000
2002-01-01	110989.75000000000
2003-01-01	115175.75000000000
2004-01-01	126440.50000000000
2005-01-01	127406.41666666700
2006-01-01	136217.33333333300
2007-01-01	134569.58333333300
2008-01-01	96764.66666666670
2009-01-01	79397.66666666670
2010-01-01	81834.58333333330
2011-01-01	67337.58333333330
2012-01-01	58299.08333333330
2013-01-01	60224.08333333330
2014-01-01	71275.66666666670
2015-01-01	86186.00000000000
2016-01-01	95589.33333333330
2017-01-01	102910.91666666700