13 - Energy At the end of 2002, gross production of electrical energy declined by 1.4%, dropping from 121,139.7 thousand KWH on the 31st December 2001 to 119,466 thousand KWH in 2005. Since 2002, expectations for the diversification of energy products have been taking shape gradually. Seismic research has shown the existence of large reserves of petrol and gas. - Mines Mining commenced in the CAR in 1958. The extractive industires in Central Africa were essentially based on two products, diamonds and gold. This table shows the data relative to diamond and gold production from 2000 to 2004. Year 2000 2001 2002 2003 2004 Weight Diamonds 461,004.22 carats Gold 15,914.20 grammes Value 43,953,590,578FCFA 79,090,950FCFA Tax 2,637,215,435 FCFA 3,001,089FCFA Weight 449,270.03 carats 333,871.08 grammes Value 41,216,740,836FCFA 169,481,880FCFA Tax 2,473,004,450FCFA 6,678,.283FCFA Weight 414,787.94 carats 15,914.20 grammes Value 36,316,456,854FCFA 79,090,950FCFA Tax 2,178,987,411FCFA 3,001,089FCFA Weight 332,679.67 carats 2,221.30 grammes Value 28,332,439,759FCFA 10,301,330FCFA Tax 1,699,946,386FCFA 206,021FCFA Weight 353,484.55 carats 12,168.51 grammes Value 27,763,308,312FCFA 61,760,045FCFA Tax 1,705,053,391FCFA 1,554,090FCFA Due to smuggling and bad management this sector provides no benefits to the country. However, the Government is putting reforms in place upgrade the sector. Other listed mineral ores include limestone, uranium, lignite, copper and iron which have not yet been exploited. 6.3 The Tertiary Sector This sector relates to trade, transport, transit and telecommunications.