*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19862
19870
19880
19890
19900
19913
19927
19931
19940
19951
19960
19970
19980
19991
20000
20010
20020
20030
20040
20050
20060
20070
20080
20090
20100
20110
20120
20132
20140
20150
20160
20170
20180
20193
20200
20210
20220
20233
20240
Total23