*Excludes Observations that spanned multiple years

Pre 197025
19701
19711
19720
19730
19742
19750
19760
19771
19782
19791
19801
19812
19820
19832
19840
19850
19860
19872
19881
19890
19901
19913
19921
19936
19946
19957
19963
19971
19982
19996
20002
20011
20024
2003204
200412
2005238
200680
200759
200827
2009111
201044
201141
201240
201333
201419
201524
201629
201749
201812
20193
20201
20210
Total1110