·

Comparative data obtained from national representative surveys, leaded by Prof., Dr. Lilia Dimova.

Three-stage random sampling:

• Selection municipalities from the whole country.
• Selection units.
• Selection respondents - through Leslie Kish scheme

Face-to-face research method for collecting data.

Respondents – adults over 18 years of age

Computing data through SPSS for Windows.

Error - + 2,5

Samples’ sides:

• N = 1 198 (1993)
• N = 1 183 (1994)
• N = 1 145 (1995)
• N = 1 012 (1997)
• N = 1 093 (1999)
• N = 1 144 (2000)