GDP share of agriculture - Country rankings:
The average for 2017 was 11 percent.The highest value was in Sierra Leone: 60.28 percent and the lowest value was in Singapore: 0.03 percent. Below is a chart for all countries where data are available for: GDP share of agriculture.
Value added in the agricultural sector as percent of GDP, 2017
(percent, Source: The World Bank, TheGlobalEconomy.com)