Between 1960 and 1970, Soviet agriculture output increased by 3% annually. Industry also improved: during the Eighth Five-Year Plan (1966–1970), the output of factories and mines increased by 138% compared to 1960. While the Politburo became aggressively anti-reformist, Kosygin was able to convince both Brezhnev and the politburo to leave the reformist communist leader János Kádár of the Hungarian People's Republic alone because of an economic reform entitled New Economic Mechanism (NEM), which granted limited permission for the establishment of retail markets. In the Polish People's Republic, another approach was taken in 1970 under the leadership of Edward Gierek; he believed that the government needed Western loans to facilitate the rapid growth of heavy industry. The Soviet leadership gave its approval for this, as the Soviet Union could not afford to maintain its massive subsidy for the Eastern Bloc in the form of cheap oil and gas exports. The Soviet Union did not accept all kinds of reforms, an example being the Warsaw Pact invasion of Czechoslovakia in 1968 in response to Alexander Dubček's reforms. Under Brezhnev, the Politburo abandoned Khrushchev's decentralization experiments. By 1966, two years after taking power, Brezhnev abolished the Regional Economic Councils, which were organized to manage the regional economies of the Soviet Union.