Complex sentence: CBC abstained from joining the Free Education Scheme introduced by Donagh O'Malley in 1969, becoming one of the 56 secondary schools (8% of the total) in the country not funded by the Government.
Split into simpler sentences: CBC abstained from joining the Free Education Scheme introduced by Donagh O'Malley in 1969. This means the school is one of the 56 secondary schools (8% of the total) in the country where the school isn't funded by the Government.