*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19731
19740
19750
19760
19770
19783
19790
19800
19810
19821
19831
19840
19850
19860
19873
19880
19891
19901
19910
19920
19930
19941
19957
19960
19970
19980
19990
20000
20011
20020
20032
20041
20050
20062
20075
20080
20091
20101
20114
20123
20136
20146
20153
20165
20174
20182
20190
20200
20211
20220
20230
20240
Total66