*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19752
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19861
19870
19880
19890
19900
19910
199210
199323
19940
19957
199610
19972
19981
199942
20000
20011
20020
20030
20040
20050
20061
20070
20085
20095
20103
20116
20124
20132
20146
20151
20160
20170
20182
20190
20202
20210
20222
20230
20240
Total138