The HFI measured so called "rights performance". It looked at an unweighted scale of 40 internationally recognised rights, with a point for each one available in each country.

The lowest scoring country, Iraq, had a score of zero, the highest, several in Scandinavia, had 38 or 39. The United States had 33 and the United Kingdom had 32, relatively low scores that they did not appreciate. China, to take another example, scored only two however.

As far as I can ascertain the human freedom index and political freedom index were both totally phased out after 1991 since they "were based on qualitative judgments, not quantifiable empirical data". Delete as applicable to work out your country's score :)

The 40 rights were:

The right to:
travel in own country
travel abroad
peacefully associate and assemble
teach ideas and receive information
monitor human rights violations
ethnic language

The freedom from:
forced or child labour
compulsory work permits
extra-judicial killings or "disappearances"
torture or coercion
capital punishment
corporal punishment
unlawful detention
compulsory party or organization membership
compulsory religion or state ideology in schools
arts control
political censorship of press
censorship of mail or telephone-tapping

The freedom for:
peaceful political opposition
multiparty elections by secret and universal ballot
political and legal equality for women
social and economic equality for ethnic minorities
independent newspapers
independent book publishing
independent radio and television networks
independent courts
independent trade unions

The right to:
a nationality
being considered innocent until proved guilty
free legal aid when necessary and counsel of own choice
open trial
prompt trial
freedom from police searches of home without a warrant
freedom from arbitrary seizure of personal property

The personal right to:
interracial, interreligious or civil marriage
equality of sexes during marriage and for divorce proceedings
homosexuality between consenting adults
practice any religion
determine the number of one's children