*Excludes Observations that spanned multiple years

Pre 1970120
197016
19710
19721
19730
19743
19759
19767
19775
19786
19799
198022
19811
19821
19831
19841
19852
19861
19871
19881
19891
19901
19911
19921
19933
19943
19954
19963
19973
19983
199910
20002
20014
20024
20036
200452
200512
200629
20072
200823
200926
201025
201128
201237
201342
201430
20153
20166
20173
201820
201918
20203
20217
20227
202312
202411
Total652