*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19801
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19930
19940
19950
19960
19971
19980
19991
20001
20011
20020
20032
20042
20051
20065
20074
20084
20091
20100
20110
20129
20130
20140
20151
20161
20175
20184
20195
20206
20214
20225
20230
20241
Total65