*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19752
19767
197712
19780
19790
19800
19810
19822
19835
19843
19850
19860
19870
19884
19894
19908
19914
19927
19934
19940
19953
19966
19971
19981
19995
200016
20016
20027
200317
200419
200512
20066
20071
200812
20093
20105
20114
20124
20133
20146
20150
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total199