*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19781
19790
19800
19810
19820
19831
19840
19850
19860
19870
19883
19890
19901
19911
19920
19931
19941
19953
19961
19970
19980
19990
20001
20010
20023
20031
20040
20050
20060
20070
20081
20090
20101
20111
201217
20134
20141
20150
20160
20171
20181
20190
20200
20211
20221
20231
20240
Total49