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Characteristics of American billionaire entrepreneurs: Source of wealth by industry
| Source of wealth by industry | Share (%) |
| Finance | 23.1 |
| Manufacturing | 18.5 |
| (of which IT) | 6.6 |
| Information | 17.0 |
| (of which IT) | 9.2 |
| Real estate | 10.5 |
| Mining, oil, and gas | 6.1 |
| Art and entertainment | 3.6 |
| Accommodation and food services | 3.2 |
| Transportation | 2.9 |
| Health care | 1.9 |
| Professional and technical services | 1.9 |
| Construction | 1.2 |
| Wholesale trade | 1.2 |
| Forestry and agriculture | 1.0 |
