*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19831
19840
19850
19860
19870
19880
19890
19900
19911
19921
19930
19942
19950
19961
19972
19980
19990
20002
20011
20020
20030
20041
20052
20060
20073
20080
20090
20107
201115
20121
20130
20140
20150
20164
20171
20184
201928
202011
20212
20227
20237
20241
Total105