*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19802
19810
19820
19835
19840
19850
198611
19870
19881
19891
19901
19912
19925
19938
19943
19956
19961
19972
19984
199915
200028
200116
20026
20037
200450
200513
20065
20078
200821
20099
201030
201144
201223
201328
201424
201529
201636
201730
20181
Total476