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*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19730
19740
19750
19765
19771
19780
19790
19800
19811
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19930
19940
19950
19961
19970
19981
19990
20000
20010
20020
20030
20040
20050
20061
20071
20080
20091
20100
20111
20122
20130
20140
20150
20164
20170
20180
20190
20200
20211
20221
20230
20240
Total24