| Rockford's 20th Century industry revolved around machine tools, heavy machinery, automotive, aerospace, fastener and cabinet hardware products, and packaging devices and concepts. The city's industrial background has produced many important and interesting inventions, among them the Nelson knitting machine, airbrush, electric brake, electric garage door opener, dollar bill changer, and electronic dartboard. In the 1990s Rockford had the ignominious honour of being listed as one of America's ten worst cities by the Rand McNally corporation. This may have been due to the lack of jobs and high number of outdated or closed factories. Crime on the west side of town was endemic, with huge areas of old established neighborhoods in extreme blight. The homicide rate in these areas was quite high. Many houses were vacant with no one wishing to buy them. The city government has developed many programs to attempt to address these problems and has seen some success. In 2005 Rockford received top honors in the America in Bloom contest with the award being 4 Blooms Tidiness. Reference |  |