 We sent 2000 questionnaires to 1000 households, of which 265 13.3 were sent back and then evaluated. This response rate is considered satisfying. Of the 265 responding persons, 162 are women and 93 men. The age distribution shows that 147 persons are aged 50-64, 105 between 65-79 years and four persons are over 80 years of age. 