Jan 21 (Reuters) - Sri Lankan shares ended marginally higher on Friday, clocking their seventh straight weekly gain, helped by gains in heavyweight industrial stocks. * The CSE All-Share index (.CSE) ended 0.08% higher at 13,371.61. For the week, the index added 0.25%. * Conglomerate Expolanka Holdings Plc (EXPO.CM) and healthcare and hospital services provider Asiri Hospital Holdings Plc were the top boosts to the index, rising 2.5% and 10.3%, respectively. * The island nation is suffering its worst financial crisis in decades amidst dwindling reserves, the threat of default and soaring inflation. * Sri Lanka"s national consumer price inflation rose 14% year-over-year in December 2021 versus a 11.1% rise in November, data from the statistics department on Friday showed. * On Thursday, the central bank raised interest rates as it shifts its focus to controlling inflation, curbing imports and attracting foreign capital as it looks to build reserves. read more * Foreign investors were net sellers in the equity market, offloading shares worth 119.2 million rupees ($590,099.01), exchange data showed. * The equity market"s turnover was 4.95 billion rupees. * Trading volume fell to 154.9 million shares from 255.6 million shares in the previous session. * Sri Lanka has reported 599,363 total coronavirus cases and 15,255 deaths as of Thursday, data from the country"s health bureau showed. * About 63.64% of Sri Lanka"s population has been fully vaccinated, according to data from Johns Hopkins University. * For a report on global markets, click ($1 = 202.0000 Sri Lankan rupees)