30,000 people would be approximately the same number as die in traffic accidents yearly in America.
According to the latest figures in the Statistical Abstract of the United States 2008, Table 111.
In 2004, the rate of death per 100,000 from firearms was 4.0 for homicide, and 5.7 for suicide. For the same year, the rate of death from vehicle accidents was 16.6. To get these as percentages, move the decimal point three places to the left.