*Excludes Observations that spanned multiple years

Pre 19704
19700
19713
19720
19730
19740
19751
19760
19771
19780
19790
19800
19810
19820
19830
19841
19857
198681
1987145
1988383
19894
199016
1991182
199266
1993154
199421
1995122
1996119
1997100
19985
199974
200057
200142
200218
200319
200416
20056
200613
200716
200819
200915
201012
201112
201219
201316
201412
201513
201617
201723
201815
201920
202016
202133
202213
202317
20241
Total1949