*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19861
19871
19883
19890
19900
19910
19924
19930
19943
19951
19960
19970
19980
19990
20004
20010
20020
200311
20041
20050
20060
20073
20081
20093
20105
20113
20120
201327
20141
20150
20162
20170
20182
20190
20200
20210
20220
20230
20240
Total76