*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19821
19830
19840
19850
19860
19871
19880
19890
19900
19911
19920
19930
19940
19951
19961
19972
19980
19990
20000
20010
20020
20030
20040
20050
20060
20071
20080
20090
20102
20110
20121
20131
20140
20150
20160
20170
20180
20191
20200
20210
20220
20230
20240
Total14