Burundi’s economic growth will accelerate to 4.8 percent in 2012 and 6 percent by 2014 as the central African country diversifies its agricultural production and boosts investment in tourism and power production, its government said.Inflation is expected to decline in 2012 while risks to the economy stem from high global oil costs that could fuel imported inflation and bouts of insecurity, the government wrote in a letter to the International Monetary Fund (IMF)."During 2012, reflecting an improved business climate that will be accompanied by increased private investment, economic growth should accelerate to 4.8 percent, with a slightly declining, albeit relatively high, inflation rate,” it said in the letter dated Dec. 19 but made public late on Wednesday.