# Advice 1: How to calculate growth rate

The coefficients of growth of population are important indicators for the calculation of demographic statistics. These data are based on information recorded in the regular census of citizens, and demonstrate natural and mechanical growth of the population.
Instruction
1
The magnitude of increase of population is calculated as the difference between the two measures at the beginning and end of the billing period. The ratio of increase of population is a value equal to the ratio of growth of the population to the average annual number. The total number of people in the country is an absolute value and is only an additional informative as other common indicators, such as number of births or the number of deaths.
2
The coefficients of increment are relative values, they have no dimensions and are used in a comparative analysis to identify the population at large. They are called relative because they represent a ratio, fraction one absolute value to another.
3
The overall rate of growth of population is equal to the sum of two values: the natural and migration factors of growth. Natural population growth is the difference between the number of births and deaths of people during a certain period. For the coefficient this value is divided by the average number.
4
Migration increase – the difference between the number of arrivals in a country of people from other countries and the number departing for permanent residence in another state. The rate of migration growth is also referred to as mechanical, it is equal to the ratio describes the difference to the average population.
5
The average number of the population conventionally accepted value, which is equal to the sum of population at the beginning of the year and at the end of the year. This assumes that the number of residents during the year grows evenly.
6
The rate of natural increase of the population, usually expressed per 1000 people per year and is the most significant characteristic of the population growth rate.
7
Based on the General ratio of increase in population is projected prospective population for future periods, which implies the preservation of the patterns of growth that are defined on the calculated time interval.

# Advice 2: How to calculate absolute increase

To determine the intensity of changes in any of the indicators over a certain period of time is used set of characteristics, which are obtained by comparing several levels of indicators measured on different levels of the timeline. Depending on how it compares measured values between obtained characteristics are referred to as growth coefficient, growth rate, growth rate, absolute increase, or an absolute value of 1% growth.
Instruction
1
Determine what kind of indicators and how it is necessary to compare among themselves to obtain the desired value of the absolute gain. Assume that this feature should show the absolute rate of change of the studied indicator, and calculated as the difference between the current level and the level taken for the base.
2
Subtract from the current value of the examined indicator of its value measured at the point of the timeline, which is taken as the base. For example, assume that the number of workers employed in manufacturing at the beginning of this month is 1549, and at the beginning of the year, which is considered the reference period, it was equal to 1200 employees. In this case, the absolute increase for the period from the beginning of the year at the beginning of the current month amounted to 349 units, as 1549-1200=349.
3
If you not only need to calculate this figure for the last one period, but also to determine the average value of the absolute growth for several periods, it is necessary to calculate this value for each time stamp in relation to the previous one, then add up the values and divide them by the number of periods. For example, suppose you want to calculate the average value of the absolute increase in the number employed for the production of staff months of the current year. In this case, subtract the value of the indicator at the beginning of February, the appropriate value for the beginning of January, then do the same operation for couples March/February, April/March, etc. After this, add these values and divide the result by the sequence number of the last involved in the calculation of the months of the year.
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