context: Research funded by the Public Policy Institute of California indicates that in 1996, 1,786 Silicon Valley technology companies with $12.5 billion in sales and 46,000 employees were run by Indian or Chinese executives. Moreover, the pace of entrepreneurship among local immigrants is increasing rapidly. While Chinese or Indian executives are at the helm of 13% of the Silicon Valley technology businesses started between 1980 and 1985, they are running 27% of the more than 4,000 businesses started between 1991 and 1996. Start-up firms remain a primary source for new ideas and innovation for Chinese American internet entrepreneurs. Many of them are employed or directly engaged in new start-up activities. The proportional share of start-up firms by ethnic Chinese in Silicon Valley skyrocketed from 9% in 1980-1984 to about 20% between 1995-1998. By 2006, Chinese American internet entrepreneurs continued to start 20% of all Silicon Valley start-up firms, leading 2000 Silicon Valley companies, and employing 58,000 workers. They still continue to own about 20% of all information technology companies that were founded in Silicon Valley since 1980.
question: How many percent did the number of Chinese American entrepreneurs in Silicon Valley increase from 1984 to 1995?
answer: 11