*Excludes Observations that spanned multiple years

Pre 19704
19700
19710
19720
19731
19740
19751
19760
19770
19780
19790
19800
19810
19823
19831
19840
19852
19860
19870
19880
19890
19902
19910
19920
19930
19940
19950
19961
19970
19980
19993
20001
20010
20020
20030
20040
20050
20061
20071
20080
20090
20101
20113
20120
20130
20141
20150
20162
20173
20182
20190
20202
20210
20221
20230
20240
Total36