*Excludes Observations that spanned multiple years

Pre 1970120
19705
19716
19724
19735
19745
19757
19761
19771
19782
19796
198011
19813
19821
19830
19840
19853
19861
19870
19880
19891
19900
19913
19920
19934
19943
19955
19965
199721
19983
19992
20001
20014
20025
20034
200420
200557
20066
20074
200826
200913
201021
201150
201216
20135
201419
201539
20166
20178
201811
201913
20205
202125
202221
202314
202421
Total642