Year-on-year growth rate = (index value of that year-value of the same period last year) ÷ value of the same period last year * 100%
Chain growth rate = (the value of an indicator in this period-the value of this indicator in the previous period)/the value of this indicator in the previous period.
Basic types of growth rate:
The growth rate refers to the ratio of the growth of a certain data index to the base period data in a certain period.
The year-on-year growth rate generally refers to the growth rate compared with the same period last year. Year-on-year growth (magnitude) compared with the previous period, year or history. The development speed can be divided into year-on-year development speed, ring-on-ring development speed and fixed-base development speed due to the different base periods. Are expressed as percentages or multiples.
Chain growth rate generally refers to the growth rate compared with the previous period.
Fixed-base growth rate: If the data of several periods are observed and the data of each period are compared with the data of the same base period, this comparison method is called fixed-base comparison. For example, comparing the GNP values of 1970, 1980, 1990 and 2000 with 1949, the four ratios obtained are called fixed base growth rates.