Worldwide adoption of open data is gaining momentum, particularly for public sector and government data. In 2013, all G7 countries signed the Open Data Charter agreeing that government data should be open by default, and many G20 countries are now introducing similar practices. Tesco used open weather data to improve operational efficiency by predicting demand increases of 300% for barbecues during 18 degree rises in temperature. A Colombian research center used open and private data to create a decision tool that helped rice farmers avoid $3.6 million in losses during a drought.