Table 2 Countries represented during all three rounds of the survey
RomaniaPolandDenmark
UKPortugalSaudi Arabia
GreeceSwedenAlbania
ItalySwitzerlandChile
GermanyAustraliaCroatia
BelgiumCyprusCzech Republic
FranceEgyptEcuador
SpainTurkeyJapan
IrelandFinlandLuxembourg
Slovak RepublicTaiwanRussia
BrazilIranSerbia
NetherlandsAndorraSlovenia
AustriaBulgaria
LithuaniaCanada