*Excludes Observations that spanned multiple years

Pre 19700
19701
19710
19720
19730
19740
19750
19762
19770
19780
19791
19800
19810
19820
19830
19840
19850
19860
19870
19880
19891
19900
19911
19921
19931
19940
199519
19960
19972
199828
19990
20000
200124
20021
20030
20040
20052
20063
20071
20082
20090
201033
201132
20122
201328
20142
20152
20169
20175
201838
201927
202023
202115
202248
202364
20240
Total418