*Excludes Observations that spanned multiple years

Pre 197055
19705
19712
19723
19732
19741
19752
19762
19775
19784
19794
198012
19813
19821
19831
19844
19855
19861
19871
19880
19892
19902
19919
19922
19934
19948
19957
19965
199726
199822
19999
200011
200113
200217
200314
200432
200547
200618
200715
200829
200936
201040
201154
2012106
201337
201433
201551
201621
201729
201819
201930
20208
202112
202212
202314
202419
Total926