*Excludes Observations that spanned multiple years

Pre 197022
19700
19710
19722
19730
19740
19752
19761
19770
19780
19795
19801
19811
19820
19831
19840
19851
19860
19872
19880
19891
19900
19910
19920
19930
19941
19954
19961
19973
19980
19991
20002
20012
20021
20034
20044
200511
20061
20071
20082
200955
201053
201120
20124
20134
201417
20154
20163
20172
20180
Total239