It is worth mentioning that these figures are mainly due to Russian Membership of EAEU, with Kazakhstan contributing 1.9% and 0.6% in gas and oil production respectively. Considerably small oil and gas reserved were discovered in Belarus while there are no such resources in Armenia. It also produces 9% of the world's electrical energy and 5.9% of the world's coal, making it the third and fourth producer in the world, respectively. In Kazakhstan, energy is the leading economic sector. The country holds about 4 billion tons of proven recoverable oil reserves and 2,000 cubic kilometers (480 cu mi) of gas. Kazakhstan is the world's 17th largest oil exporter and the world's 23rd largest natural gas exporter. Russia has the world's largest natural gas reserves, the 8th largest oil reserves, and the second largest coal reserves. Russia is also the world's leading natural gas exporter and the second largest natural gas producer, while also the largest oil exporter and the largest oil producer. While trade in oil and gas between resource-rich Russia and Kazakhstan is relatively low, the Belarus economy is heavily dependent on the access to the Russian hydrocarbons and - unlike the case with Kyrgyzstan and Armenia, Russia is Belarus's main trade partner accounting for 47% of all the trade. Belarus imports Russian crude oil (of which 45-50% were used for production of oil products to export) and natural gas (which were not directly re-exported) for the prices below the market ones, paying $173 for 1000 cubic meters of gas (for comparison - $250 for Armenia, $430 for Ukraine). By 2019, Russia, Kazakhstan, Belarus and Armenia intend to create a common electricity market as well as a single hydrocarbons market by 2025. "With the creation of a single hydrocarbons market, we will have a deeper coordination that will allow us to be more competitive both in terms of pricing and in terms of getting high value added products in this very interesting and important market", stated Eurasian Commissioner Daniyal Akhmetov. The major economic centres are Moscow, Minsk and Astana. The distance between Moscow and Minsk is 717 kilometers, and the distance between Moscow and Astana is 2700 kilometers, making infrastructure a key challenge for the integration of member states. Major infrastructure projects began during the 2000s in order to modernise and connect the regional bloc to other markets, facilitating both integration and trade in the region. In 2007 Moscow announced it will invest 1 trillion USD by 2020 to modernise the country's infrastructure.