*Excludes Observations that spanned multiple years

Pre 19701
19700
19711
19720
19730
19740
19750
19760
19771
19780
19790
19800
19811
19820
19830
19840
19850
19860
19874
198840
19891
19900
199111
19928
199318
19949
199511
19965
19971
19981
19994
20000
20013
20020
20031
200432
20051
200610
20073
20085
200914
20101
20111
20123
20132
20141
20152
20164
20173
20183
20192
20200
20211
20223
20233
20240
Total215