The government's goal of EU integration has resulted in some market-oriented progress. Moldova experienced better than expected economic growth in 2013 due to increased agriculture production, to economic policies adopted by the Moldovan government since 2009, and to the receipt of EU trade preferences connecting Moldovan products to the world's largest market. Moldova has signed the Association Agreement and the Deep and Comprehensive Free Trade Agreement with the European Union during summer 2014. Moldova has also achieved a Free Visa Regime with the EU which represents the biggest achievement of Moldovan diplomacy since independence. Still, growth has been hampered by high prices for Russian natural gas, a Russian import ban on Moldovan wine, increased foreign scrutiny of Moldovan agricultural products, and by Moldova's large external debt. Over the longer term, Moldova's economy remains vulnerable to political uncertainty, weak administrative capacity, vested bureaucratic interests, corruption, higher fuel prices, Russian pressure, and the separatist regime in Moldova's Transnistria region.