*Excludes Observations that spanned multiple years

Pre 19704
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
20031
20042
20050
200617
20071
200813
20091
20104
201134
20120
20134
20142
20150
20164
20174
20184
201917
202012
20210
20220
Total307