The calculation of annual economic growth rate is relatively simple, that is, subtract the economic indicators of the next year (such as GDP or per capita GDP) from the economic indicators of the previous year and then divide them by the economic indicators of the previous year. If expressed as a percentage, it must be multiplied by 100%. For example, in 2003, China's GDP was 6168.79 billion yuan (calculated at the price of 1990, the same below), while in 2004,
The other is the calculation of the average annual economic growth rate, which measures the average economic changes over the years.
The calculation of average annual economic growth rate is more complicated. For the sake of accuracy, we use mathematical symbols and formulas to express it. Assume that the value of economic variable y changes from initial value y0 to yn after n time periods (such as year, month, day, etc.). ), the average growth rate of y in each time period should be g = n √ yn/y0- 1. For example, according to the price of 1990, China's per capita GDP is 1952, and in 2004 it was 5 196.5 yuan. According to this formula, the average annual growth rate of per capita GDP in these 52 years is 6.07%. But if the average annual economic growth rate is relatively small, it can also be calculated in the form of index, and the calculation formula is g=(In? Yn/y0)/n. For example, calculated at US$ 65,438+0,996, the real per capita GDP of the United States rose from US$ 65,438+0,340 in 1970 to US$ 33,330 in 2000. According to this formula, the average annual per capita growth rate in the United States is 1.8%.