Write a question about the following article: At the 2000 United States Census, 1,953,631 people inhabited the city, and the population density was 3,371.7 people per square mile (1,301.8/km²). The racial makeup of the city in 2000 was 49.3% White, 25.3% African American, 6.3% Asian, 0.7% American Indian, 0.1% Pacific Islander, 16.5% from some other race, and 3.1% from two or more races. In addition, Hispanics made up 37.4% of Houstons population in 2000, while non-Hispanic Whites made up 30.8%. The proportion of non-Hispanic whites in Houston has decreased significantly since 1970, when it was 62.4%.
How many percent of people were not Hispanic?