*Excludes Observations that spanned multiple years

Pre 197055
19700
19710
19720
19730
19740
19751
19761
19770
19781
19791
19800
19810
19821
19831
19840
19850
19860
19870
19880
19891
19900
19910
19922
19932
19940
19950
19961
19973
19981
19991
20000
20011
20020
20030
20040
20050
20061
20070
20080
200912
201039
201121
20122
20135
20142
20150
20163
20170
20187
20194
20200
20210
20220
Total169