*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19831
19840
19851
19861
19871
19886
19891
19905
19915
19924
199328
19944
19957
199613
199711
199814
19998
20005
20018
20020
200312
200412
20059
20067
20074
200812
20097
20109
20114
20128
201317
201423
201513
20168
20171
20187
20196
202010
20213
20223
20231
20240
Total300