*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19882
19892
19900
19911
199211
199360
19942
199516
19961
19971
19980
19990
20000
20013
20020
20032
20042
20051
20060
20071
20081
20091
20101
20110
20120
20130
20140
20151
20162
20170
20181
20190
20202
20211
20224
20230
20240
Total119