Introduced in 1951, an electricity tax has been levied on final consumption. In addition there was a tax on hydro-power production in 1993 €“1997. Mining and quarrying and manufacturing were exempted 1994 €“2003. Since 2004 mining and quarrying and manufacturing except power-intensive processes pay a low rate of NOK 0,0045 per kWH. Power-intensive processes remain exempted. Ordinary rate (paid by households, agriculture, service industries and public sector) is NOK 0,1365 per kWh in 2014.