Singapore - 11%
Hong Kong - 8.8%
Switzerland - 8.4%
Kuwait, Qatar, and the United Arab Emirates - ?
US - 4.1%
In terms of number of millionaires (here):
The United States had by far the most millionaire households (4.7 million) followed by Japan, China, the United Kingdom, and Germany.
Singapore saw the highest growth in millionaire households, up 35 percent, followed by 33 percent for Malaysia, 32 percent for Slovakia, and 31 percent for China.