*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19760
19770
19781
19790
19800
19811
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19930
19940
19950
19960
19970
19980
19990
20000
20010
20020
20030
20040
20050
20060
20070
20082
20095
201014
201113
20120
20131
20140
20150
20161
20170
20186
20191
20201
20211
20222
20230
20240
Total51