*Excludes Observations that spanned multiple years

Pre 19708
19701
19710
19720
19730
19740
19750
19760
19770
19781
19790
19801
19810
19820
19830
19842
19853
19860
19870
19880
19890
19900
19910
19921
19930
19940
19950
19960
19970
19981
19991
20000
20010
20020
20030
20040
20050
20060
20071
20080
20092
20101
20111
20120
20130
20140
20150
20160
20171
20180
20191
20200
20210
20220
20231
20240
Total27