*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19741
19750
19761
19770
19780
19791
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19930
19940
19951
19961
19970
19980
19990
20000
20011
20020
20030
20040
20050
20063
20070
20080
20092
20100
20110
20120
20130
20140
20150
20162
20171
20182
20190
20200
20210
20220
20230
20240
Total18