a)
Data from 1980 to 1992 are the figures of state-owned and collective-owned
construction enterprises. Data from 1993 to 1995 are the figures of all economic types of
construction enterprises above towns. The statistical coverage from 1996 to
2001 included the fourth and higher grades construction enterprises
(old classification of grades)
and that since 2002 included all grades
construction enterprises, both general constructing contractors and
professional contractors (excluding the construction enterprises
of work
subcontractors). Therefore the data were not comparable with the data of the
previous years. The same as in the following table.
b)
The number of employed persons refers to the annual average number from 1993
to 1997.
