*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19742
19750
19764
19770
19781
19790
19800
19811
19820
19833
19840
19853
19861
19870
19880
19892
19901
19910
19921
19931
19941
19950
19962
19970
19980
19990
20003
20010
20020
20030
20040
20050
20061
200710
20087
20094
20102
201110
20126
20134
201461
2015281
201611
201733
201853
2019149
202037
202120
202227
20239
20241
Total752