*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19901
19916
19920
19930
19944
19950
19960
19970
19980
19990
20002
20010
20020
20031
20043
20053
20068
20075
20080
20092
20103
20115
201223
20137
20144
20153
20161
20170
20180
20190
20200
20210
20220
20230
20241
Total82