*Excludes Observations that spanned multiple years

Pre 19701
19700
19712
19721
19730
19741
19750
19760
19770
19780
19790
19800
19811
19820
19831
198469
19851
19861
19871
19883
198941
199028
199116
199212
199311
199412
199514
199625
199729
19981
199978
2000195
200194
200255
200379
200467
200587
200678
200785
200872
200989
201074
2011105
2012155
201396
2014102
201592
201694
201786
20182
Total2056