*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19755
19760
19770
19780
19790
19800
19810
19820
19830
19841
19851
19860
19870
19880
19894
199011
19919
19923
19931
19941
19950
19961
19971
19983
19994
20002
20010
20024
20032
20046
20052
20060
20070
20084
20093
20100
20116
20123
201312
20140
20150
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total89