*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19721
19730
19740
19750
19761
19770
19780
19790
19800
19810
19820
19830
198413
19859
19862
19871
19881
19890
19900
19910
199215
199340
199454
19959
199623
19975
19980
19990
20005
20011
20021
20037
20045
20058
20065
20075
20085
20098
201010
20117
20123
20135
20148
201510
20166
20173
20181
20195
20200
20211
20223
20235
20240
Total293