*Excludes Observations that spanned multiple years

Pre 197020
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19800
19812
19820
19830
19840
19850
19861
19870
19880
19890
19900
19912
19920
19930
19940
19950
19960
19973
19983
19990
20000
20011
20020
20032
20040
20050
20060
20071
20080
20090
20100
20110
20120
20130
20140
20150
20161
20170
20180
20191
20200
20210
20220
20231
20240
Total39