*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19763
19770
19781
19791
19800
19810
19820
19830
19840
19850
19860
19871
19880
19890
19900
19910
19922
19930
19940
19956
19961
19974
19980
19990
20000
20010
20020
20030
20041
20050
20060
20072
20086
20098
20102
20113
20120
20132
20140
20150
20161
20170
20181
20190
20202
20210
20221
20233
20240
Total51