*Excludes Observations that spanned multiple years

Pre 19701
19701
19711
19720
19730
19740
19750
19761
19777
19780
19791
19800
19818
19820
19830
19840
19850
19860
19873
19882
19894
19904
19918
199214
199311
19944
199558
19964
19971
19981
199911
200054
200137
200217
20036
20046
20054
20066
20072
200821
200917
201012
201138
20126
20138
20145
20154
201637
201719
201814
2019102
202076
202170
202292
2023165
20245
Total968