Supplements as generally understood include vitamins, minerals, fiber, fatty acids, or amino acids, among other substances. U.S. authorities define dietary supplements as foods, while elsewhere they may be classified as drugs or other products. There are more than 50,000 dietary supplements available. More than half of the U.S. adult population (53% - 55%) consume dietary supplements with most common ones being multivitamins.
Wind power capacity has expanded to 369,553 MW by December 2014, and total wind energy production is growing rapidly and has reached around 4% of worldwide electricity usage.
Twelve states produced 80% of U.S. wind power in 2013. Source: U.S. Energy Information Administration, Electric Power Monthly. In 2013, 12 states accounted for 80% of U.S. wind-generated electricity, according to preliminary generation data released in EIA's March Electric Power Monthly report. Texas was again the top wind power state with nearly 36 million megawatthours (MWh) of electricity. Iowa was second, with more than 15 million MWh, followed by California, Oklahoma, Illinois, Kansas, Minnesota, Oregon, Colorado, Washington, North Dakota, and Wyoming.