Inside the ten northeastern states implementing the Regional Greenhouse Gas Initiative, carbon dioxide emissions per capita decreased by about 25% from 2000 and 2010, as the state economies continued to grow while enacting various energy efficiency programs. In 2013 there were 11 weather and climate disaster events with losses over $1 billion each in the United States. In total these 11 events losses were over $110 billion. 2013 was the warmest year ever in the contiguous United States and about one-third of all Americans experienced 10 days or more of 100-degree heat. These increasingly common and severe weather events have put pressure on existing disaster-relief efforts. For instance, the increasing rate of wildfires, the increasing length of the fire season, and increasing severity have put pressure on national and international resources. In the US, federal firefighting efforts surpassed $2 billion a year for the first time in 2017, and this expense was repeated in 2018. At the same time, internationally shared capital, such as firefighting planes, has experienced increasing demand, requiring new investment. Increasing floods (such as the 2019 Midwestern U.S. floods), heat waves, and droughts have brought economic problems to farmers business and increased product prices. USDA research indicates that "climate change is likely to drive down yields for some crops, harm milk production, and lead to a drop in nutrient density for key crops like rice and wheat." In April 2019, 69% of Americans thought that climate change is happening and 55% think that it is mostly human caused. In September 2019 approximately 75% thought that climate change is real and man made. In November 2016, 69% of registered voters said that USA should remain in Paris Agreement. 13% said that it should leave the agreement  At least three US high schools have objected to mention of climate change in 2019 graduation speeches by students. Historical support for environmental protection has been relatively non-partisan. Republican Theodore Roosevelt established national parks whereas Democrat Franklin D. Roosevelt established the Soil Conservation Service. This non-partisanship began to change during the 1980s when the Reagan administration stated that environmental protection was an economic burden. Views over global warming began to seriously diverge among Democrats and Republicans when ratifying the Kyoto Protocol was being debated in 1998. Gaps in opinions among the general public are often amplified among the political elites, such as members of Congress, who tend to be more polarized. A 2017 study by the Center for American Progress Action Fund of climate change denial in the United States Congress found 180 members who deny the science behind climate change; all were Republicans.