No chart image found

*Excludes Observations that spanned multiple years

Pre 1970116
197038
197126
197246
197325
197444
197527
197639
197746
197841
197971
198087
1981124
1982133
1983159
1984180
1985192
1986215
1987134
1988136
1989302
1990314
1991271
1992309
1993249
1994241
1995247
1996285
1997298
1998283
1999337
2000298
2001349
2002377
2003339
2004404
2005419
2006432
2007477
2008527
2009548
2010571
2011425
2012472
2013343
2014358
2015389
2016128
20170
20180
20190
20200
20210
Total11871