The volume of Dutch private sector investments was 11 percent down in January 2013 compared to the same month last year, the Central Bureau for Statistics (CBS) announced Wednesday.According to the CBS, the decline was more substantial than in December, when private sector investments were more than 9 percent down from one year previously.Investments in construction and means of transport declined considerably in January. The decline was partly caused by a change in tax legislation, which encouraged entrepreneurs to purchase a car before Jan. 1.The CBS said the volume of private sector investments has been declining for almost a year now and expects the same trend for March.