*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19831
19840
19850
19860
19873
198824
19890
19900
19911
19929
19934
19940
19955
19961
19970
19980
19999
20001
20011
20020
20030
200432
20054
20060
20070
20080
20090
20108
20110
20121
20131
20140
20150
20161
20170
20188
20199
20208
20215
202211
20232
20241
Total151