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*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19801
19810
19820
19830
19840
19850
19861
19871
19882
19890
19901
19910
19921
19931
19942
19951
19960
19971
19980
19992
20000
20014
20024
20031
20040
20050
20062
20070
20084
20093
20101
20110
20121
20132
20140
20150
20161
20175
20185
201922
20208
20219
20223
20230
20240
Total90