Ten years prior the share of the most educated population was lower: in 1991, 6,043 students graduated from tertiary education and in 2009 about 18,100 or 200% more than in 1991.
Pred desetimi leti je bil delež najbolj izobraženega prebivalstva precej nižji; v letu 1991 je diplomiralo 6.043 študentov terciarnega izobraževanja, v letu 2009 pa približno 18.100 ali za 200% več kot v letu 1991.