*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19822
19831
19840
19850
19860
19870
19880
19890
19900
19911
19920
19931
19949
19954
19963
19970
19980
19992
20001
20010
20020
200312
20040
20052
200610
200736
20087
20097
20106
20116
20122
20135
20142
20151
20163
201712
20184
20191
20200
20214
20220
20232
20240
Total147