States with minimum requirements for the proportion of renewable energy in their electricity mix lead the way in the American Wind Energy Association's recently released ranking of wind energy development in 2004. At the end of the year, California was in first place with 2096 MW, slightly up on its 2043 MW in 2003, followed by Texas at 1293 MW, which added no new plant last year. Completing the top five were Iowa with 632 MW, Minnesota, 615 MW and Wyoming, 285 MW. In the association's ranking of wind plant developers, FPL Energy is way ahead with 2758 MW in its portfolio at the end of 2004. A distant second went to Shell Wind Energy, with 315 MW, 78 MW less than in the previous year, followed by AEP (311 MW), Enxco (298 MW) and PPM Energy (225 MW). The top three manufacturers in installed capacity remained the same, although second and third place switched positions. GE Energy held onto its top ranking by supplying 171 MW in 2004, down from the 903 MW the year before. Mitsubishi was second with 120 MW installed capacity in 2004 compared to 201 MW the year before. Vestas, in third place, installed 97 MW in 2004, compared with 359 MW the year before. The biggest buyer of wind energy was Southern California Edison, which buys the output from 1025 MW. Excel Energy buys 884 MW of wind, Pacific Gas & Electric buys 680 MW, PPM buys 606 MW and TXU Energy buys the output from 580 MW.