| State | Rank | Registrations |
|---|---|---|
| California | 1 | 52,619 |
| Florida | 2 | 10,470 |
| Texas | 3 | 9,632 |
| New York | 4 | 9,372 |
| Virginia | 5 | 8,650 |
| Illinois | 6 | 7,286 |
| Washington | 7 | 6,970 |
| Pennsylvania | 8 | 6,948 |
| Massachusetts | 9 | 6,060 |
| Maryland | 10 | 5,673 |
| Top 10, total | 123,680 | |
| United States, total | 199,148 | |
| Top 10 as % of U.S. total | 62.1 |
SOURCE: Based on R. L. Polk & Co., Hybrid Vehicle Registrations More Than Double In 2005, press release 4/5/06, available at http://usa.polk.com/News/LatestNews/2006_0504_hybrids.htm as of Sept. 22, 2006.