*Excludes Observations that spanned multiple years

Pre 197019
19700
19710
19720
19730
19740
19750
19760
19770
197814
19790
19800
19810
19820
19835
19840
19850
19860
19872
198837
19890
19901
199110
19929
19939
19941
199510
19964
19970
19981
19990
20001
20012
20020
20034
20043
20056
20061
20070
20081
20091
20101
20111
20120
20131
20141
20150
20160
20170
20180
20190
20202
202130
20223
20232
20240
Total182