*Excludes Observations that spanned multiple years

Pre 19708
19700
19710
19720
19731
19740
19750
19760
19771
19780
19790
19800
19810
19820
19830
19840
19850
19863
19871
19880
19890
19903
19910
19924
19930
19941
19951
19961
19971
19980
19990
20000
20010
20020
20030
20040
20051
20060
20073
20083
20093
20101
20110
20120
20130
20140
20150
20161
20172
20181
20190
20200
20211
20221
20230
20240
Total42