*Excludes Observations that spanned multiple years

Pre 19702
19701
19710
19720
19730
19741
19751
19762
19771
19781
19790
19801
19810
19820
19834
19842
19851
19860
19870
19880
19891
19901
19910
19923
19931
19940
19953
19965
19971
19984
19993
20005
20013
20021
20032
20040
20051
20063
20071
20086
20093
20101
20113
20122
20136
20146
20153
20163
20171
20181
20190
20200
20210
Total90