*Excludes Observations that spanned multiple years

Pre 197011
19700
19710
19720
19730
19740
19750
19761
19771
19780
19792
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19931
19940
19950
19960
19970
19980
19990
20000
20010
20020
20030
20040
20050
20060
20070
20080
20090
20100
20110
20120
20132
20140
20150
20161
20170
20180
20191
20202
202110
202212
20235
20241
Total50