Correlation coefficients show that the largest relationship is between the change in birth rate and the change in GDP in the one-year period. This means that changes in GDP in a given year have the greatest impact on changes in birth rates in the following year. This statistical relationship is well illustrated by the graphs in Fig. 1.1.

The data in Table 1.1, column 2, and Fig. 1.1 illustrate the dynamics of birth rates in Ukraine from 1990 to 2020.

From 1990 to 2002 we have a reduction in the birth rate by 40 %, in physical terms from 657.2 thousand people to 390.7 thousand people. From 2002 to 2012 there was an increase of 34 %, and in physical terms from 390.7 thousand people in 2002 to 520.7 in 2012.