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    Trend 1990 - 2011. Food and Agriculture Organization of the United Nations. Food and Agriculture Organization Statistics: Food Security - Key Indicators | Country: Singapore | Item: Road density (per 100 square km of land area) | Element: Value - per 100 square km of land area, 1990-2011. Data-Planet™ Statistical Ready Reference by Conquest Systems, Inc. Dataset-ID: 067-001-067 | NobleID