ISTANBUL — Turkey's gross domestic product (GDP) grew 4.3 percent year-on-year in the first quarter, official data showed on Tuesday.GDP expanded 1.7 percent from the previous quarter, adjusted for seasonal and calendar effects, and it expanded 4.4 percent year-on-year in the first quarter adjusted for calendar effects, the Turkish Statistics Institute said.Turkish economists estimated first quarter's growth at 4.1 percent in Anadolu Agency Growth Expectation Survey on 4 June. Gross Domestic Product (GDP) - the market value of all officially recognized finished goods and services produced within a country in a year - increased by 4.3 percent at inflation-corrected prices in the first quarter of the year, Turkish Statistical Institute said on Tuesday.On the other hand, GDP increased by 14.8 percent to reach 407.310 Million Turkish Liras (US$195.3 billion) at current prices compared to the same quarter of 2013.