*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19732
19740
19750
19760
19770
19780
19790
19800
19810
19821
19830
19840
19850
19860
19870
19880
19890
19907
19911
19920
19936
19941
19951
19960
19970
19980
19993
20002
20016
20020
20034
20040
20052
20060
20078
20081
20094
20103
20111
20121
20132
20145
20152
20162
20170
20181
20191
20200
20211
20220
20230
20240
Total68