*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19730
19740
19750
19761
19770
19781
19791
19801
19811
19820
19830
19843
19850
19860
19870
19883
19890
19900
19910
19920
19930
19941
19952
19960
19970
19981
19993
20000
20010
20023
20030
20040
20050
20061
20071
20080
20090
20100
20110
20121
20130
20140
20150
20160
20170
20180
20191
20200
20210
20220
Total28