Preface
��. Tianjin Statistical Yearbook is a large-sized
statistics publication to reflect various aspects of Tianjin��s
economic and social development, which was started in 1984 and published year
after year, having formed a series of yearbooks.
��. Written
materials in the book include Statistical
Communique on the 2011 National Economic and Social
Development of
��. The major
data sources of this book are obtained from annual professional statistical
report, a few from sample surveys and departments�� statistics. Some data in
Chapter 3 are obtained from summed results of computer tabulation of National
Sixth Population Census.
��. The units
of measurement used in this book are internationally standard measurement
units; sector listed in this table is classified by the standard of GB/T
4754-2002. When calculating per capital indicators, we use permanent population
from 2005 and use registered population before 2005. From 2006, the division
standard of urban and rural areas adopts the new rules of National Bureau of
Statistics Regulation 2006[60].
��. Statistical
discrepancies due to rounding are not adjusted in this book.
��. Notations
used in this book: ��blank�� indicates
the data not available or the figure is not large enough to be measured with the
smallest unit in the table. ��#�� indicates
the major items of the total.
��. As a result
of keeping consistent with data of census, surveys and checks, the change of
national statistics system and adjustment of figures provided by departments,
some data in this yearbook is different from former yearbook. When using
historical data, users should take the data of this book as standard.
��. Since Tianjin Statistical Yearbook had been published
openly, we have been concerned and supported by the readers at home and abroad.
They advance much valuable suggestion on content and edition of the yearbook,
we deeply thanks for this all. Based on our limited level, perhaps there are
some mistakes in this book, we welcome all of the readers give us your
criticism in order to help us further improving our edition level, and
providing services for the readers better.