*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19742
19750
19761
19770
19780
19790
19800
19812
19820
19830
19842
19858
19865
198712
19884
19893
19905
19912
19923
19933
19940
19950
19962
19973
19985
19995
200018
20017
20022
200310
200415
20058
20064
20072
20081
20093
20101
20110
20120
20130
20141
20150
20160
20170
Total141