At the same time, 181,035 declared themselves Ukrainians, 111,726 Russians, 126,010 Gagauz people and 51,867 Bulgarians. The proportion of Ukrainians and Russians in the area controlled by Chisinau has fallen from 8,4% to 6,5% and 5,9% to 4,0% respectively between 2004 and 2014. Meanwhile, the percentage of Gagauz has risen slightly from 4,4% in 2004 to 4,5% in 2014.. How many years spanned from when Gagauz' population has risen since 2004?