*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19871
19881
19890
19907
19912
19920
19932
19948
19959
19963
19974
19980
199913
20008
200113
20022
20030
20043
20050
20060
20070
20081
20090
20104
20116
20121
20130
20144
20151
20161
20171
20182
20191
20200
20212
20221
Total103