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A relatively small number of 140,000 units were sold during the lifetime of the product, however the Segway PT only made up 1.5% of total company profit. Factors contributing to the end of production include the price (US$5,000 at launch), and the learning curve in learning to balance on a Segway which has led to notable accidents involving Usain Bolt, George W Bush and the Segway Company owner Jimi Heselden. While the Segway has remained popular for security and tourism, electric scooters have been more popular for personal mobility.