*Excludes Observations that spanned multiple years

Pre 197060
19701
19718
19721
19731
19746
19751
19760
19773
19780
19790
19800
19811
19822
19830
19841
19852
19860
19870
19882
19890
19900
19913
19920
19931
19942
19952
19961
19971
19983
19991
20002
20010
20022
20032
20041
20051
20062
20071
200814
20090
20101
20110
20121
20131
20141
20150
20160
20170
20180
20190
20200
20211
20220
20230
20240
Total133