*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19801
19810
19820
19830
19840
19850
19860
19870
19880
19891
19900
19910
19920
19931
19941
19952
19962
19970
19980
19992
20000
20010
20020
20034
20040
20050
20060
20070
20083
20090
20100
20112
20121
20132
20142
20151
20161
20178
20183
20193
20204
20214
20221
20231
20240
Total51