*Excludes Observations that spanned multiple years

Pre 19709
19700
19710
19720
19730
19740
19751
19762
19770
19780
19790
19801
19811
19821
19830
19840
19850
19860
19871
19880
19890
19905
19910
19921
19930
199414
19950
19960
19970
19980
19990
20000
20010
20020
20030
20040
20050
20060
20072
200812
200910
20101
20111
20120
20130
20140
20150
20160
20170
Total62