SINGAPORE (Reuters) -Singapore's economy grew slower than initial estimates in the fourth quarter of last year, on downward revisions in construction and manufacturing but the city-state was still hopeful of a pick up in activity in 2024. Gross domestic product (GDP) rose 2.2% on a year-on-year basis in the fourth quarter, government data showed on Thursday, lower than an advance estimate of 2.8% released last month. The fourth-quarter expansion was also below the 2.5% in a Reuters poll of forecasts.