*Excludes Observations that spanned multiple years

Pre 19700
19700
19711
19720
19730
19741
19750
19760
19770
19780
19790
19800
19810
19820
19831
19844
19850
19860
19870
19887
19895
19907
199111
19926
19933
19946
199518
199610
199712
199813
19993
20000
200110
20022
200331
200424
200550
200647
200732
200844
200942
201042
201143
201242
201350
201444
201548
201640
201738
20180
Total737