*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19835
19840
19851
19860
19875
198814
19890
19900
19911
19921
19931
19940
19950
19963
19973
19980
19995
20000
20010
20020
20030
20040
20051
20060
20070
20080
20091
20100
20111
20121
20131
20141
20150
20160
20170
20182
20193
20201
20216
20225
20237
20242
Total72