Given the task definition and input, reply with output. This task involves annotating the answer type to a given question that involve some kind of complex reasoning (including numerical reasoning). Note that the questions require looking at more than one part of the passage to answer. There are 3 possible answer types (i) spans, (ii) numbers and (iii) dates. If the answer can be found in the passage, label it as "span". If the answer is a number, label as "number". Similarly, label "date" if you think the answer to the given question is a date.

Passage: 1% of those at school in the South-East gained no GCSE passes in 2010; Portsmouth was most with 2.5%, and Windsor and Maidenhead had the lowest with 0.2%. For school free school meals, the region has the lowest percentage in England with 7.2%; the highest percentage is Southampton with 17%, and the lowest is Wokingham with 3.5% (the second lowest in England after Rutland); Buckinghamshire is 4.3%, then Bracknell Forest and Surrey are 4.9%. For truancy, the highest is South Bucks at 7.0, then Canterbury 7.0, Portsmouth 6.9, Thanet 6.9, Southampton 6.4, and Rushmoor 6.1. The lowest truancy percentages are for Tandridge 2.5, Windsor & Maidenhead 2.5, and Slough 2.5.
Question: How many more percentage points in truancy did South Bucks have over Portsmouth?
number