*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19753
19760
19770
19785
197915
19803
19813
19825
19834
19843
198523
198652
198727
198833
198934
199066
199184
199282
199332
199474
1995207
1996135
1997318
1998368
1999685
2000192
2001236
2002192
2003299
2004372
2005201
2006386
2007916
2008395
2009715
2010676
2011575
2012577
2013551
201418
20150
20161
20170
Total8563