*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19751
19761
19771
19780
19790
19801
19812
19820
19832
19843
19850
19862
198710
198818
198919
19909
199148
199254
19932
199414
199559
199649
199736
199815
19996
20005
200125
20027
200326
20049
20054
200625
20072
20082
200910
201039
201135
20125
201320
201442
201515
201640
201724
201839
201960
20200
Total786