The 2006 Census enumerated 13 012 475 adults aged 15 and over whose highest level of educational attainment was a trades certificate or diploma; a college, CEGEP or non-university certificate or diploma; or a university certificate, diploma or degree in 2006. This was an increase of 32% from 9 864 970 in 2001. In 2006, 23% of Canadians aged 15 and over had completed a university certificate, diploma or degree, 17% had completed a college, CEGEP or non-university certificate or diploma and 11% had completed a trades certificate or diploma. The proportion of the population aged 15 and over with a high school diploma or equivalent as their highest credential was 26% and those with less than a high school diploma or equivalent was 24%.