*Excludes Observations that spanned multiple years

Pre 197073
19703
19712
19722
19731
19740
19750
19760
19770
19780
19790
198031
19810
19822
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19935
19940
19951
19960
19970
19980
19990
20001
20010
20021
20030
20048
20054
20060
20070
20089
20092
20100
20110
201219
20130
20141
20150
20160
20170
Total165