*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19781
19793
19801
19810
19820
19830
19841
19851
19860
19870
19881
19892
19900
19910
19923
19930
19942
19952
19960
19970
19980
19991
20000
20017
20022
20032
20042
20051
20061
20071
20081
20091
201019
201130
20122
20134
20144
201515
201614
20173
201827
201926
202029
202144
202230
20234
20240
Total287