*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
198756
19889
19891
19903
199122
19923
199340
19944
199526
199639
199752
19983
19992
20001
20010
20020
20030
20049
20053
20060
20071
20082
20091
20102
20111
20121
20130
20141
20151
20165
20171
20185
201910
202022
20211
20222
20231
20240
Total330