*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
19880
19890
19905
19910
19925
199341
19946
19950
19963
19970
19980
19990
20000
20010
20020
20030
20041
20050
20061
20070
20084
20092
20100
20110
20121
20131
20141
20150
20160
20172
20182
20190
20202
20211
20221
20230
20240
Total79