*Excludes Observations that spanned multiple years

Pre 197022
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19865
19870
19880
19890
19900
19912
19920
19931
19941
19952
19961
19970
19980
19990
20000
20010
20020
20032
20040
20050
20060
20070
20080
20090
20100
20111
20123
20133
20140
20150
20162
20172
20181
20191
20200
20211
20220
20230
20240
Total50