*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19751
19760
19771
19780
19790
19801
19811
19820
19832
19840
19850
19861
19870
19881
19890
19901
19917
19922
19931
19940
19951
19960
19973
19980
19990
20000
20010
20020
20032
20040
20053
20060
20070
20083
20090
20100
20111
20120
20130
20140
20150
20161
20170
20180
20190
20200
20211
20222
20232
20240
Total38