ID - unique dyadic identifier (ccodea*1000000+ccodeb*1000+year-1000)
ID - ccodea*1000+ccodeb
ID - unique identifier for country year A (ccodea*10000+year)
ID - unique identifier for country year B (ccodeb*10000+year)
CCode
Year
AFFINITY - 1=most, -1=least (Three category voting data:  1=yes, 2=abstain, 3=no
AFFINITY - 1=most, -1=least (Two category voting data:  1=yes, 3=no)
Sample Source:  1=COW System Membership 2008.1, 2=UNGA members, 3=Both
AFFINITY - s3un4608 plus interpolated values for missing
AFFINITY - s2un4608 plus interpolated values for missing