No chart image found

*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19859
19860
19872
198826
19898
199013
19918
19926
199321
19940
19958
19960
19971
19980
199916
20000
20010
20020
20031
20040
20050
20061
20071
20080
20092
20101
20113
201255
20134
20142
20151
20162
20174
20180
20190
20200
20210
Total195