Dic: fully (used to emphasize an amount)

2. (formal) (used to emphasize an amount) | the whole of; as much as

• The disease affects fully 30 per cent of the population.

4. ADV : ADV amount | Fully is used to emphasize how great an amount is.[ WRITTEN ]

•  Fully 30% of the poor could not even afford access to illegal shanties.

.... OALD, Cobuild