Dec 30 (Reuters) - Sri Lankan shares closed higher on Thursday as strong gains in the consumer discretionary sector countered losses in energy stocks. * The CSE All-Share index (.CSE), which is set for its best year since 2010, rose 0.88% to 12,019.75 points at the closing bell. * Investment vehicle Browns Investments Plc (BROW.CM) was the top boost to the index, gaining 4.3%. Financial services provider Senkadagala Finance Plc (SFCL.CM) rebounded after three sessions of sharp losses to add 17.3%. * The equity market"s turnover was 6.46 billion Sri Lankan rupees ($31.86 million), according to stock exchange data. * Trading volume dropped to 509.5 million shares, from 809.4 million shares in the previous session. * Foreign investors were net sellers in the equity market, offloading shares worth 245.3 million rupees, as per exchange data. * The island-nation has reported 586,183 coronavirus cases and 14,944 deaths, as of Thursday, data from the country"s health bureau showed. * About 63.46% of Sri Lanka"s population has been fully vaccinated, according to data from Johns Hopkins University. * For a report on global markets, click ($1 = 202.7500 Sri Lankan rupees)