*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19732
19742
19750
19760
19770
19782
19790
19800
19811
19821
19831
19840
19850
19860
19870
19883
19896
19901
199122
199221
199316
199413
199513
19967
199729
199817
199910
200014
20015
20020
200352
200419
200518
200612
200727
200814
200918
201023
201113
201230
201323
201420
201515
201633
201726
201815
201912
20206
20216
202210
20230
20240
Total578