 Although poverty has declined since the turn of the 21st century, economic problems still exist.Costa Rica is facing problems of underemployment, foreign and internal debt, and a trade deficiency.The oldest evidence of human occupation in Costa Rica is associated with the arrival of groups of hunter-gatherers about 10,000 to 7,000 years BC, with ancient archaeological evidence (stone tool making) located in the Turrialba Valley, at sites called Guardiria and Florence, with matching quarry and workshop areas with presence of type clovis spearheads and South American inspired arrows.