*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19722
19731
19742
19750
19761
19770
19780
19790
19800
19810
19822
19830
19840
19850
19860
19870
19880
19890
19900
19912
19920
19932
19940
19951
19960
19970
19982
19990
20000
20018
20021
20030
20040
20050
20060
20070
20080
20090
20100
20111
20120
20130
20140
20150
20161
20170
20183
20190
20200
20210
20220
20230
20240
Total30