They are governed by councils whose functions and duties include governing their institution and appointing its vice-chancellor or chief executive. Expenditure on educational institutions at all levels is 7.3% of GDP, above the OECD average of 6.3% (see Figure 8). Between 2005 and 2010, New Zealand has increased its spending by 0.8 percentage points, above the OECD average of 0.4 percentage points. As in most OECD countries, a large portion of expenditure on educational institutions comes from public sources (82.6%, compared to the OECD average of 83.6%).