*Excludes Observations that spanned multiple years

Pre 197019
19701
19710
19720
19731
19740
19750
19760
19771
19781
19790
19801
19811
19821
19830
19841
19850
19860
19871
19880
19890
19905
19913
19925
19933
19941
19953
19963
19972
19984
19994
20001
20010
20020
20031
20040
20051
20060
20076
20086
20093
20101
20111
20121
20131
20142
20152
20162
20171
20182
20190
20200
Total92