However, immigrants today tend to be concentrated in a few countries; early waves were comparably about as large, but were divided among many nationalities: German, Swedish, French, Chinese, Greek, Japanese, Filipino, Italian, Irish, etc.
The population of the U.S. today is estimated to be 298.5 million. The population of the U.S.leading up to WWI was estimated to be around 100 million.
Hispanics today out number blacks, who make up 14% of the population ... it's thought that their numbers (Hispanics) come in at around 18% ... a good portion of that growth occurring in the last 20 years. With a million Spanish speaking Hispanic types surging illegally across our borders annually ... it won't be long before their numbers will exceed first 20% then 25% of the U.S. population. Concentrating those numbers mostly in the Southwest U.S. the demographics will reflect a Hispanic majority in that region (easily) within the next 20 years. The illegal immigration faucet needs to be turned off now.