*Excludes Observations that spanned multiple years

Pre 19700
19700
19711
19721
19730
19740
19751
19761
19770
19783
19790
19800
19810
19821
19830
19840
198527
198633
198712
1988110
198922
199054
199141
199242
199373
199449
199580
199630
199726
199820
199947
200035
200115
20029
200310
200413
20056
20068
200710
20088
200917
201036
201142
201254
201371
201441
201531
201627
201728
201811
20190
20200
20210
20220
Total1146