For 150 years, top ten surnames in the United States

For 150 years, surnames in the United States have hardly budged. Here are the top 10 surnames for 1860:
1860: Smith, Johnson, Brown, Williams, Jones, Davis, Clark, Taylor, Thompson, Hall
1910: Smith, Johnson, Brown, Williams, Jones, Miller, Davis, Anderson, Wilson, Taylor 
1990: Smith, Johnson, Williams, Jones, Brown, Davis, Miller, Wilson, Moore, Taylor
How many German immigrants changed Schmidt to Smith or Müller to Miller upon arrival on American soil—or in response to anti-German sentiment surrounding World War I? More Americans actually identify themselves as having German roots than any other ethnic group. As the new millennium began, both Garcia and Rodriguez made it into the top 10 for the first time: 
2000: Smith, Johnson, Williams, Brown, Jones, Miller, Davis, Garcia, Rodriguez, Wilson