*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19771
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19891
19901
19911
19921
19934
19943
19957
19961
19970
19980
19993
20001
20012
20021
20030
20040
20051
20060
20070
20081
20090
20100
20113
20120
20132
20141
20151
20160
20170
20182
20191
20200
20212
20220
20230
20240
Total41