*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19752
19760
19770
19781
19791
19800
19812
19821
19830
19840
19851
19860
19870
19881
19890
19900
19910
19921
19932
19940
19951
19960
19971
19980
19990
20000
20014
20020
20030
20040
20050
20061
20070
20085
20090
201018
20115
20122
20136
20141
20150
20162
20172
20181
20194
20201
20211
20222
20231
20241
Total71