Less immigration than we have
Around 15-18% non white
Less than half or half ours
The amount of immigration only tells part of the story. No one looks at this comprehensively. No one looks at it from the point of you of illegal immigration, or the number of children porn of immigrants, or how old the white population is. Consider that most ethnic Europeans in America are going to be dead within 30 to 40 years. Less than half will be replaced.