*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19800
19810
19820
19830
19840
19851
19861
19878
19880
19891
19900
19910
19922
19930
19940
19954
19960
19970
19981
19990
20000
20012
20020
20030
20040
20050
20060
20070
20080
20091
20100
20110
20121
20130
20140
20150
20160
20170
20180
20190
20202
20210
20221
20230
20240
Total28