*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19816
19820
19832
19842
19851
19860
19871
19889
19890
19906
199148
199210
19939
19941
19952
19964
19970
19981
19990
20000
20010
20022
20031
20041
20050
20060
20074
20080
20091
20100
20114
20122
20134
20143
20150
20162
20172
20180
Total130