Australia has a sophisticated, competitive and profitable financial sector and a strong regulatory system. For the 10 years ended mid-2013, the Commonwealth Bank was ranked first in Bloomberg Riskless Return Ranking a risk-adjusted 18%. Westpac Bank was in fourth place with 11% and ANZ Bank was in seventh place with 8.7%. The four major banks are among the world's largest banks by market capitalisation and all rank in the top 25 globally for safest banks. They are also some of the most profitable in the world. Australia's financial services sector is the largest contributor to the national economy, contributing around $140 billion to GDP a year. It is a major driver of economic growth and employs 450,000 people.