Disposable household and per capita income

Columns: Rank | Country | NCU | Currency in 2004 | PPP rate 2004 | Mean Income ( PPP )
1 | United States | 32,195 | United States Dollar | 1 | 32,195 | 2 | Canada | 33,785 | Canadian Dollar | 1.27 | 26,602 | 3 | Switzerland | 49,844 | Swiss Franc | 1.88 | 26,512 | 4 | United Kingdom | 16,685 | British Pound | 0.64 | 26,070 | 5 | Norway | 254,243 | Norwegian krone | 9.8 | 25,943 | 6 | Austria | 22,527 | Euro | 0.89 | 25,311 | 7 | Germany | 20,901 | Euro | 0.91 | 22,968 | 8 | Denmark | 202,275 | Danish Krone | 9.0 | 22,475 | 9 | Netherlands | 20,607 | Euro | 0.92 | 22,398

Example questions:
What is the capital of the country with the highest disposable income per capita in the Luxembourg Income Study of Disposable household and per capita income ? | What is the capital of the country with the fourth highest disposable income per capita in the Luxembourg Income Study of Disposable household and per capita income ? | What is the capital of the country with the sixth highest disposable income per capita in the Luxembourg Income Study of Disposable household and per capita income ? | What is the capital of the country with the second highest disposable income per capita in the Luxembourg Income Study of Disposable household and per capita income ?

Answers:
Washington , D.C. | London | Vienna | Ottawa