*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19863
19871
19880
19890
19902
19912
19925
19935
19943
19953
19963
19975
19983
19994
20000
200110
20028
20030
20049
20052
20065
20076
20088
20091
20105
20114
20120
20130
20140
20150
20163
20170
Total100