*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19741
19750
19766
19775
19781
19791
19801
19815
19820
19831
19841
19851
19863
19870
19881
19890
19902
19910
19922
19930
19940
19951
19960
19970
19980
19992
20001
200110
20024
200314
200439
20053
20063
200720
200817
200924
201059
201151
20129
201318
20145
20150
201614
201719
201827
201969
202032
202133
202238
202364
20240
Total607