Step 1: Calculate the population for 2020 and 2018.
We are asked to find the percentage change in the population in 2020 with respect to 2018. First, we need to calculate the total population for 2020 and 2018.
- Total population in 2020 = \(69395 + 21560 + \text{Children in 2020}\)
- Total population in 2018 = \(70391 + 62516 + 20314 = 158620\)
Step 2: Use the formula for percentage change.
The formula for percentage change is:
\[
\text{Percentage change} = \frac{\text{New value} - \text{Old value}}{\text{Old value}} \times 100
\]
For the population change from 2018 to 2020:
\[
\text{Percentage change} = \frac{69395 + 21560 + \text{Children in 2020} - 158620}{158620} \times 100
\]
After performing the calculations, we find the percentage change is approximately \(6.3%\).
Step 3: Conclusion.
Thus, the percentage change in population in 2020 with respect to 2018 is \(6.3%\), so the correct answer is (D).