*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19841
19853
19860
19870
19881
19892
19900
19910
19921
19931
19942
19950
19961
19971
19982
19991
20001
20011
20022
200310
20049
20056
20067
20076
20084
20090
20100
20110
20123
20130
20140
20150
20160
20170
20180
20190
20200
20210
20220
Total65