*Excludes Observations that spanned multiple years

Pre 19701
19700
19711
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19883
19894
19900
19912
19929
19931
19940
199535
19960
19970
199813
19990
20000
20010
20020
20031
20042
20050
20060
20073
20080
20090
20100
20110
20120
20132
20144
20150
20161
20172
20180
20193
20202
20211
20225
20233
20240
Total98