A 2005 household survey study shows a socio-economic distribution for households in Lima. It used a monthly family income of 6,000 soles (around US$1,840) or more for socioeconomic level A; between 2,000 soles (US$612) and 6,000 soles (US$1,840) for level B; from 840 soles (US$257) to 2,000 soles (US$612) for level C; from 420 soles (US$128) to 1200 soles (US$368) for level D; and up to 840 soles (US$257) for level E. In Lima, 18% were in level E; 32.3% in level D; 31.7% in level C; 14.6% in level B; and 3.4% in level A. In this sense, 82% of the population lives in households that earn less than 2000 soles (or US$612) monthly. Other salient differences between socioeconomic levels include levels of higher education, car ownership and home size.