*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19731
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
199110
19920
19930
19940
19950
19960
19970
19980
19990
20000
20010
20020
20030
20040
20050
20060
20070
20083
20090
20100
20110
20120
20130
20140
20150
20161
20171
20180
20191
20201
20210
20220
20236
20240
Total25