*Excludes Observations that spanned multiple years

Pre 19700
19701
19710
19720
19730
19740
19750
19760
19770
19780
19791
19802
19811
19820
19830
19843
19852
19860
19870
19880
19890
19903
19913
19927
19937
199414
19953
19961
199710
19980
19992
20000
200116
20020
20036
20040
20051
20063
20070
20083
20094
201012
20113
20124
201315
201419
201510
201639
201746
201846
201932
202056
202156
202245
20231
20240
Total477