*Excludes Observations that spanned multiple years

Pre 19700
19700
19711
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19831
19841
19850
19860
19871
19882
19891
19900
19917
19926
19930
19940
19950
19961
19973
19980
19990
20000
200111
20022
20030
20040
20053
20063
20071
20081
20091
20107
20112
20120
20131
20144
20150
20162
201716
201817
201917
202017
20219
202212
20236
20242
Total158