*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19782
19790
19800
19810
19820
19835
19840
19851
19860
19870
198828
19890
19900
19914
19925
19931
19940
19957
19963
199711
19985
199915
20000
20011
20020
20031
20040
20057
20062
20071
20084
20090
20100
20110
20121
20130
20143
20151
20160
20170
20180
20194
20201
202111
20222
20232
20243
Total131