The NACE Rev.1 classification is based on the ISIC, Rev.3 1990. The main indicators are number of employees, hours worked, and wages. In the first quarter of each year data on earnings are classified by sex. A special survey on occupations is carried out in October. Each month of the quarter is reported separately.
Main variables are monthly gross wages, and monthly net wages.
At the end of 1999 the list of active enterprises contained 37654 enterprises and 1880 budgetary organizations. Enterprises with the participation of central and local government capital, enterprises where at least 50 persons are employed, and enterprises for which the turnover of the preceding year was at least Ls 300,000. It contains 4812 enterprises. Enterprises for which the turnover of the preceding year was less than Ls 300,000 and the number of the employed persons does not exceed 49 and is at least 20. It contains 1340 enterprises.