*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19730
19740
19750
19760
19770
19782
19790
19800
19810
19823
19830
19840
19854
19860
19871
19887
19891
199014
19913
199216
19934
19948
19951
19967
19971
19982
19991
20005
20011
20020
20030
20045
20056
20060
20071
20081
20091
20100
20111
20121
20132
20140
20150
20160
20170
Total102