*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19732
19740
19750
19760
19770
19781
19791
19800
19810
19820
19831
19841
19853
19861
198718
19884
19893
19901
19910
19925
19932
199410
199515
19962
19974
19981
19992
20001
20014
20020
20032
20040
20056
20065
200716
200812
200911
201010
201113
201216
201333
201411
201510
201616
20175
201828
20193
202010
202142
202251
202348
202410
Total441