*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19901
19910
19921
19931
19941
19950
19961
19970
19981
19990
20001
20010
20020
20031
20040
20053
20061
200715
200816
20092
20101
20112
20123
20131
20142
20150
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total54