*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19771
19780
19790
19800
19810
19820
19830
19841
19851
19860
19870
19880
19891
19900
19911
19924
199312
19945
199522
19969
19979
19982
19990
20000
20010
20020
20037
20049
20055
200615
20076
20085
20099
201014
201117
20126
201314
20147
201513
201619
20175
20185
20199
20202
202112
20222
20230
20240
Total249