*Excludes Observations that spanned multiple years

Pre 19705
19700
19710
19720
19730
19741
19751
19761
19771
19780
19790
19800
19811
19822
19830
19840
19850
19860
19871
19880
19890
19900
19910
19920
19931
19940
19950
19961
19970
19980
19991
20000
20010
20020
20030
20040
20050
20060
20070
20080
20090
20100
20110
20120
20130
20140
20150
20160
20170
20180
20191
20200
20210
20226
20230
20240
Total23