Some sources of publicly available forecasts:

Board of Trustees of the Social Security Administration   http://www.ssa.gov/OACT/TR/

International Energy Agency   http://www.iea.org/

International Monetary Fund   http://www.imf.org/

OECD  http://www.oecd.org/home/0,2987,en_2649_201185_1_1_1_1_1,00.html

Social Security Advisory Board   http://www.ssab.gov/

United Nations  http://www.un.org/

U. S. Bureau of Labor Statistics   www.bls.gov

U.S. Census Bureau   http://www.census.gov/

U.S. Congressional Budget Office   www.cbo.gov

U.S. Energy Information Administration   http://www.eia.doe.gov/

U.S. National Center for Health Statistics   http://www.cdc.gov/nchs/

World Bank   http://www.worldbank.org/