*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19722
19730
19740
19750
19760
19772
19782
19790
19800
19810
19820
19830
19840
198519
19860
19874
198822
19896
199020
19917
199228
199319
19949
19957
19960
19970
19983
19994
20002
200114
20026
20031
20041
20050
200619
20070
20088
20094
20103
20113
20121
20131
20140
20151
20161
20170
20180
20190
Total222