*Excludes Observations that spanned multiple years

Pre 19702
19700
19715
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19841
19850
19867
19871
198817
19890
19900
19912
19920
19932
19945
19959
19965
19970
19980
19992
20001
20010
20020
20033
20041
20051
20064
20074
20081
20092
20107
20115
201255
20132
20143
20152
20162
20173
20181
20190
Total155