*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19930
19943
19951
19960
19970
19980
19991
20000
20010
20020
20030
20040
20050
20061
20070
20080
20090
20100
20110
20121
20130
20140
20151
20161
20170
20180
20190
20202
20210
20221
20232
20241
Total17