but while the split four years ago was 54-40 percent for John Kerry, it was 68-30 percent for Obama, a net swing of 24 points in Obama's favor

[agnis]

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but while the split four years ago was 54-40 percent for John Kerry, it was 68-30 percent for Obama, a net swing of 24 points in Obama's favor
Выражение встречается в следующем контексте:
Eighteen- to 24-year-olds accounted for roughly the same percentage of the electorate—17 percent—as they did in 2004, but while the split four years ago was 54-40 percent for John Kerry, it was 68-30 percent for Obama, a net swing of 24 points in Obama's favor, which was by far the biggest shift in any age group.
Заранее спасибо

[d.]

если 4 года назад расклад был 54 на 40 в пользу Джона Керри, то [в этом году] он состаивл 68 на 30 в пользу Обамы - чистый рост составил 24 процента

[d.]

не рост, изменение, пардон