*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19921
19932
19941
19950
19960
19970
19980
19990
20000
20010
20021
20030
20040
20050
20061
20071
20081
20092
20107
20116
201214
20139
20149
20154
201618
201744
20186
20191
20201
202113
20220
20230
20240
Total143