*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19753
19760
19770
19780
19791
19801
19810
19820
19830
19840
19850
19860
19870
19880
19891
19900
199130
19920
19930
19940
19951
19961
19970
19980
19990
20000
20010
20020
20031
20040
20050
20061
20070
20085
20091
201019
201139
20120
201318
20145
20150
201614
201710
201840
201937
202022
202132
202246
20232
20240
Total330