*Excludes Observations that spanned multiple years

Pre 19705
19701
19711
19720
19730
19741
19750
19761
19771
19781
19791
19800
19810
19820
19830
19840
19853
19860
19871
19884
19890
19900
199121
199238
199344
199414
199537
19960
19975
19980
19990
20000
20012
20027
20032
20044
20051
200617
20071
200815
20094
20104
201134
20120
20134
20142
20150
20164
20176
20184
201920
202016
202127
202236
202339
202428
Total456