By 2003, the Icelandic Heathen organisation Ásatrúarfélagið had 777 members, by 2015, it reported 2,400 members, and by January 2017 it claimed 3,583 members, constituting just over 1% of the Icelandic population. In Iceland, Heathenry has an impact larger than the number of its adherents. Based on his experience researching Danish Heathens, Amster stated that while it was possible to obtain membership figures of Heathen organisations, it was "impossible to estimate" the number of unaffiliated solo practitioners. Conversely, in 2015, Gregorius estimated that there were at most a thousand Heathens in Sweden—both affiliated and unaffiliated—however observed that practitioners often perceived their numbers as being several times higher than this. Although noting that there were no clear figures available for the gender balance within the community, he cited practitioners who claim that there are more men active within Swedish Heathen organisations. Schnurbein observed that most Heathens in Scandinavia were middle-class professionals aged between thirty and sixty.