*Excludes Observations that spanned multiple years

Pre 19700
19700
19711
19721
19730
19740
19751
19760
19770
19783
19792
19801
19811
19823
19832
19842
19852
19861
19877
198826
19890
19904
19916
19929
19939
19944
19956
19967
19973
19980
199913
20009
200149
20025
20031
20041
20056
200618
200729
20087
20099
201022
201123
20125
201315
201413
201529
201647
201729
201860
201916
20200
20210
20220
Total507