*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19861
19870
19883
19890
19900
199113
19928
19932
19940
19950
19960
19970
19980
19990
20000
20010
20020
20031
20042
20050
20061
20070
20082
20090
20101
20111
20120
20130
20140
20150
20161
20172
20180
20193
20201
20212
20221
20232
20241
Total49