In 2015, with network length, Switzerland has not only the world's most dense railway network ( km/103km2, except for very small countries and city-states) despite the Alps covering about 60% of its surface, but it is also a world leader in kilometres traveled: per inhabitant and year (2015). Virtually 100% of its network is electrified, except for the few tracks on which steam locomotives operate for tourism purposes only. There are 74 railway companies in Switzerland. The share of commuters who travel to work using public transport (as main mode of transport) is 30%. The share of rail in goods transport performance by road and rail (modal split) is 39%.