A small Swedish survey found at least 50 in common use: https://sverigesradio.se/sida/artikel.aspx?programid=411&artikel=2066499 https://sverigesradio.se/sida/

A small Swedish survey found at least 50 in common use: https://sverigesradio.se/sida/artikel.aspx?programid=411&artikel=2066499 https://sverigesradio.se/sida/artikel.aspx?programid=411&art...