In May the seasonally adjusted turnover was 0.7 per cent lower than in the preceding month while it remained the same in June.
The turnover of large enterprises not adjusted for seasonal variation fell by 2.2 per cent year-on-year in July 2015, the data show.
The turnover declined by 3.2 per cent in January to July from the corresponding period last year.
The enterprises engaged in primary production, and bank and insurance activities are excluded from the statistics.
The enterprises described in the statistics make up nearly 70 per cent of the turnover of all enterprises operating in Finland, represent more than one-half of the investments made and employ good 40 per cent of the personnel of all enterprises.