Of the estimated 62,000,000 - 70,000,000 Catholics in the United States how many would you estimate have read the Catechism Of The Catholic Church?
Of the estimated 1,200,000,000 Catholics in the World how many would you estimate have read the Catechism Of The Catholic Church?
More than very close to none, which is what you alleged.
If we can count the Baltimore Catechism, I would say many. The newer catechism, which is written at a higher level, is much more wordy.