*Excludes Observations that spanned multiple years

Pre 19707
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19801
19810
19820
19830
19840
19850
19861
19870
19881
19890
19900
19910
19921
19930
19940
19951
19960
19970
19980
19992
20004
20010
20020
20030
20040
20050
20060
20070
20082
20090
20100
20111
20120
20130
20140
20150
20160
20170
20182
20191
20202
20211
20222
20230
20240
Total29