For past 30 years us gdp per capita ppp has been consistently ~35% greater, which is to say that the roughly grow at the same rate

https://www.wolframalpha.com/input/?i=France+and+us+gdp+per+...

Here is a ratio to illustrate my point better (the ratio is roughly flat)

https://www.wolframalpha.com/input/?i=France+divided+by+us+g...