*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19831
19843
19850
19862
19871
19880
19890
19900
19910
19920
19931
19940
19951
19960
19970
19980
19990
20000
20011
20021
20036
20041
20051
20060
20070
20080
20090
20100
20111
20121
20133
20140
20150
20160
20170
20180
20190
20200
20211
20220
20231
20240
Total27