*Excludes Observations that spanned multiple years

Pre 19707
19700
19711
19721
19730
19740
19750
19763
19771
19780
19791
19802
19810
19820
19832
19841
19851
198622
198714
198819
198927
199024
199162
199244
199348
199428
199519
199625
199735
199828
199936
20006
200134
200211
20039
200428
200522
20066
20078
200823
20094
20106
201110
20120
20132
20144
20155
201627
20175
20180
Total661