*Excludes Observations that spanned multiple years

Pre 19700
19700
19711
19720
19730
19741
19750
19760
19770
19780
19792
19800
19811
19820
19830
19840
19850
19861
19871
198815
19892
19901
199114
199215
199349
199419
199531
19965
199718
19982
19990
20000
20016
20024
20032
200412
200520
20062
20070
20080
20093
20101
20113
20122
201315
201417
201514
201636
201781
2018112
201980
202055
202156
202265
202390
20240
Total854