*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19757
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19883
19892
19909
19910
19923
19930
19943
19953
19960
19977
19980
19994
20007
20013
20020
20031
20045
20054
20062
20070
20081
20092
20100
20111
20122
20130
20140
20150
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total69