*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19881
19891
19901
19910
19925
19939
19942
19956
19960
19973
19980
19990
20000
20010
20021
20030
20041
20051
20061
20070
20082
20097
20102
20110
20120
20133
20142
20151
20161
20170
20183
20195
20204
20213
20222
20231
20240
Total69