TAIPEI, June 4 (Reuters) - Taiwan’s economy is expected to grow 5.46% in 2021, the statistics agency said on Friday, upgrading a previous forecast of 4.64% predicted in February on the back of a strong rebound in exports. Growth in the first quarter was revised higher to 8.92% year-on-year from a preliminary 8.16%, the Directorate General of Budget, Accounting and Statistics said. The statistics office also revised up the export growth forecast for 2021 to 20.40% from a previous 9.58%. (Reporting by Jeanny Kao and Ben Blanchard) Our Standards: The Thomson Reuters Trust Principles.