Dive Brief:

• Wind generation is a growing share of the United States energy mix, with 11 states using the clean energy resource for more than 10% of their power, according to the U.S. Energy Information Administration. 
• According to the EIA, wind energy has increased in the United States each year since 2001, supplying 4.7% of the country's overall generation last year. 
• Iowa, South Dakota and Kansas have the largest windpower shares in the nation, all over 20%.

Dive Insight:

Bolstered by technology advancements and policy changes, wind power is a steadily-growing part of the United States Energy mix, according to the EIA. Improved access to transmission and federal production tax credits have pushed states to build more wind power, aided by more efficient and larger turbines.

Iowa had the largest wind generation share last year, at more than 31%. South Dakota and (25.5%) and Kansas (23.9%) followed. Other states topping 10% include: Oklahoma, Minnesota, North Dakota, Idaho, Vermont, Colorado,  Oregon and Maine. And the EIA expects Texas and New Mexico to break into that list when 2016 generation data is examined.

Texas is the highest wind-producing state, accounting for up 24% of national wind generation and 9.9% of Texas's total electricity generation in 2015.

Wind facilities produced 190,927 GWh of electricity in 2015, accounting for 4.7% of net U.S. electric power generation. "This level represents a doubling of wind's generation share since 2010, when the share was 2.3%," EIA noted. "Based on monthly data through July, wind has provided 5.6% of U.S. generation in 2016."

According to the American Wind Energy Association, wind energy will rise to 10% of U.S. total generation by 2020 and 20% by 2030. 

EIA also noted that solar generation, including solar thermal, utility-scale photovoltaic, and distributed photovoltaic resources, made up 10% of California's electricity generation in 2015. Rooftop solar panels made up 38% of the District of Columbia's electricity generation in 2015, although D.C. has few utility-scale generators and imports most of its electricity from neighboring states.