*Excludes Observations that spanned multiple years

Pre 197011
19700
19710
19720
19730
19740
19752
19760
19773
19781
19792
19801
19812
19821
19830
19843
19850
198620
198723
198851
19897
19908
199112
199224
1993101
199417
199593
19965
199717
19984
199933
200025
200122
20024
20035
20042
200510
20067
20075
200822
200923
201021
201158
20121
20132
20145
20153
20166
201710
201846
201949
202047
202160
202246
202349
20242
Total971