By 2006, tourism had become the second largest industry in Nicaragua. Previously, tourism had grown about 70% nationwide during a period of 7 years, with rates of 10%–16% annually. The increase and growth led to the income from tourism to rise more than 300% over a period of 10 years. The growth in tourism has also positively affected the agricultural, commercial, and finance industries, as well as the construction industry. President Daniel Ortega has stated his intention to use tourism to combat poverty throughout the country. The results for Nicaragua's tourism-driven economy have been significant, with the nation welcoming one million tourists in a calendar year for the first time in its history in 2010.2,100-year-old human footprints called "Huellas de Acahualinca" preserved in volcanic mud near Lake Managua.