*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19751
19760
19770
19780
19791
19800
19810
19821
19830
19840
19850
19862
19873
19880
19891
19903
199179
199264
199325
19941
19950
19961
19970
19980
19992
20001
20010
20020
20032
200430
20051
20061
20070
200819
200910
20100
20110
20122
20133
20140
20150
20164
201713
201811
201947
202036
202163
202251
202338
20240
Total516