The rate of new recurrence at 0-1 years was 13.7 % ( > 2cm = 3.4 % , < 2cm = 10.3 % ) , at 1-5 years it was 30.8 % ( > 2cm = 9.5 % , < 2cm = 21.3 % ) , at 5-10 years it was 40.1 % ( > 2cm = 13.8 % , < 2cm = 26.3 % ) and at over 10 years it was 50.0 % ( > 2cm = 25.0 % , < 2cm = 25.0 % ) .