Alberta’s economy is one of the strongest in Canada, supported by the burgeoning petroleum industry and to a lesser extent, agriculture and technology. The per capita GDP in 2007 was by far the highest of any province in Canada at C$74,825. This was 61% higher than the national average, and more than twice that of some of the Atlantic provinces.In 2006 the deviation from the national average was the largest for any province in Canadian history..[37] According to the 2006 census,[38] the median annual family income after taxes was $70,986 in Alberta (compared to $60,270 in Canada as a whole).