*Excludes Observations that spanned multiple years

Pre 19704
19700
19711
19720
19732
19745
19751
19761
19770
19781
19790
19800
19810
19820
19835
19841
19853
19861
19871
19880
19897
19904
19913
19923
19933
19942
19953
199611
19976
199820
199920
200038
200134
200233
200346
200435
200528
200642
200738
200839
200935
201054
201138
201223
201317
201427
201525
20169
20170
20180
Total669