Year	Units
1960-01-01	67216.62712718200
1961-01-01	62021.70415635910
1962-01-01	65522.81020598500
1963-01-01	84215.58203956780
1964-01-01	99416.26548237739
1965-01-01	93723.28385361600
1966-01-01	88959.45507406481
1967-01-01	93241.08959551119
1968-01-01	93257.20448586870
1969-01-01	82448.20440124690
1970-01-01	91614.32063782211
1971-01-01	109102.56703981700
1972-01-01	138843.22342078100
1973-01-01	137398.64457065702
1974-01-01	103036.52152443900
1975-01-01	98733.92929584370
1976-01-01	106751.79697182000
1977-01-01	109656.65207822100
1978-01-01	131873.24110224400
1979-01-01	142363.28325336700
1980-01-01	126853.24401379900
1981-01-01	124790.53804804699
1982-01-01	132286.38347265200
1983-01-01	150796.46421762300
1984-01-01	146891.56744380700
1985-01-01	153800.34657772200
1986-01-01	157237.41055012500
1987-01-01	168351.34109891900
1988-01-01	184536.36880299200
1989-01-01	192460.21903574400
1990-01-01	167411.16666666698
1991-01-01	132693.83333333300
1992-01-01	132800.00000000000
1993-01-01	148202.16666666700
1994-01-01	159244.41666666700
1995-01-01	162113.83333333300
1996-01-01	168787.50000000000
1997-01-01	180893.75000000000
1998-01-01	187283.58333333302
1999-01-01	183134.58333333302
2000-01-01	185139.16666666700
2001-01-01	204897.41666666700
2002-01-01	213635.91666666698
2003-01-01	214920.83333333300
2004-01-01	213939.08333333300
2005-01-01	203309.75000000000
2006-01-01	195405.33333333300
2007-01-01	200333.91666666700
2008-01-01	177649.58333333300
2009-01-01	166249.91666666698
2010-01-01	169237.16666666700
2011-01-01	161771.08333333300
2012-01-01	170384.08333333300
2013-01-01	188728.08333333300
2014-01-01	206369.58333333300
2015-01-01	219458.58333333300
2016-01-01	224398.83333333300
2017-01-01	211718.08333333300