*Excludes Observations that spanned multiple years

Pre 1970185
197016
19716
19725
19736
197415
19759
197612
19776
197824
197930
198028
198126
198223
198333
198439
198547
198657
198768
198885
198974
199083
199184
199279
199379
199497
1995113
1996149
1997229
1998172
1999187
2000238
2001231
2002199
2003386
2004370
2005387
2006489
2007266
2008250
2009287
2010324
2011252
2012199
2013167
2014170
2015204
2016113
20170
20180
20190
20200
20210
20220
Total6598