*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19741
19751
19763
19770
19783
19790
19801
19814
19822
19834
19843
19852
19861
19870
19881
19891
19900
19911
19921
19935
19943
19952
19961
19970
19983
19996
20003
20012
20023
20030
20040
20050
20061
20078
200812
20093
20104
20111
20123
20135
20144
20154
20168
20171
20183
20192
20201
20213
20221
20233
20241
Total125