*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19789
19797
19803
19813
19823
19833
19845
19853
198612
19873
198821
198912
199012
199111
19929
19930
1994189
1995200
1996103
1997475
199831
1999901
200045
200146
2002148
200338
2004142
2005110
200672
2007188
2008110
2009129
2010199
2011116
2012176
2013103
20148
20150
20162
20170
Total3647