No chart image found

*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19801
19810
19820
19830
19840
19851
19862
19870
19880
19895
19900
19913
199215
199316
19941
19951
19960
19970
19980
19991
20000
20010
20020
20030
20041
20050
200610
20070
20082
20090
20100
20111
20120
20130
20141
20150
20162
20170
20180
20190
20200
20210
Total63