*Excludes Observations that spanned multiple years

Pre 19702
19701
19711
19720
19730
19740
19750
19760
19770
19781
19790
19800
19810
19820
19830
19840
19850
19860
19870
19881
19896
19902
19915
199212
199333
19940
19958
19962
19971
19981
19998
20002
20010
20022
20030
20041
20051
200612
20076
20085
20090
20101
20111
20121
20130
20141
20154
20161
20172
20182
20192
20200
20210
20220
20230
20240
Total128