*Excludes Observations that spanned multiple years

Pre 19704
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19851
19860
19874
19883
19890
19902
19910
19921
199323
19941
19952
19968
199711
19980
19991
20000
20010
20021
20030
20045
20051
20061
20070
20080
20090
20104
20111
20120
20130
20142
20150
20164
20172
201814
20195
20208
202111
20223
20231
20242
Total126