*Excludes Observations that spanned multiple years

Pre 19701
19700
19715
19720
19730
19741
19750
19760
19770
19782
19790
19802
19810
19820
19830
19841
19859
198660
1987138
1988278
198939
199021
1991161
199283
1993135
199440
1995211
1996149
1997150
199816
199964
200044
200144
200229
20038
200422
20054
20062
20077
200811
20092
20104
201114
201216
201315
201412
201516
201614
20178
20186
201912
20207
202113
20225
Total1881