Explanatory Notes on Major Statistical Indicators
【Administrative Division】refers to the division of administrative areas by the state. The Constitution of the People’s Republic of China stipulates that the administrative areas in China are divided as: 1) The whole country is divided into provinces, autonomous regions and municipalities directly under the central government; 2) Provinces and autonomous regions are divided into autonomous prefectures, counties, autonomous counties and cities; 3) Autonomous prefectures are divided into counties, autonomous counties and cities; 4) Counties and autonomous counties are divided into townships, nationality townships and towns; 5) Municipalities and large cities are divided into districts and counties, 6) The state shall, when necessary, establish special administrative regions.
【Temperature】refers to the air temperature.
Monthly average temperature is the summation of average daily temperature of one month divided by the actual days of that particular month.
Annual average temperature is the summation of monthly average of a year divided by 12 months.
【Relative Humidity】refers to the ratio of actual water vapor pressure to the saturation water vapor density under the current temperature. The statistical method is the same as that of temperature.
【Volume of Precipitation】refers to the deepness of liquid state or solid state (thawed) water falling from the sky to the ground that has not been evaporated, infiltrated or run off. The calculation method is as follows:
Monthly precipitation is the summation of daily precipitation of a month.
Annual precipitation is the summation of 12 months precipitation of a year.
【Sunshine Hours】refer to the actual hours of sun irradiating the earth. The calculation method is the same as that of the precipitation.
【Comparable Prices】refer to prices that are used to remove the factors of price change in calculating economic aggregates, so as to facilitate comparison of aggregates over time. Two methods are used for calculating economic aggregates at comparable prices: 1. Multiplying the output of products by their constant prices of certain year; 2. Deflation of data at current prices by relevant price index.
【Constant Price】refers to the average price of a given product in certain year, which is used for comparison of output value over time. As the output value at constant prices removes the factor of price changes, it reflects the trend of production development over time. Since 1949, with the changes in general price level, National Bureau of Statistics has issued nationally unified constant prices five times: the 1952 constant prices for 1949-1957; the 1957 constant prices for 1957-1971; the 1970 constant prices for 1971-1981; the 1980 constant prices for 1981-1990; and the 1990 constant prices have been used since 1991.
【Average Annual Growth Rate】Two methods for calculating average annual growth rate are applied in China, one is often called “level approach”, or the method of calculating geometric average, which is derived by comparing the level of the last year of the interval with that of the beginning year; the other is called "accumulative approach" or algebraic average or equation method, which is derived by the summation of the actual figure of each year in the interval divided by the figure in the base year.
Usually the results calculated by the two methods are fairly close, but they differed sharply when uneven economic development occurred with striking fluctuations in growth.
The average annual growth rates listed in this statistical yearbook are calculated by “level approach” except for the growth rate of investment in fixed assets. The base years are not listed when the years are listed for average annual growth rates.