*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19930
19940
19950
19960
19971
19982
19990
20001
20010
20020
20030
20040
20052
20060
20070
20080
20092
20101
20115
20121
201315
201418
201514
201615
201717
201827
20197
202026
202115
202223
202335
20240
Total228