World War 2 occurred in the late 40's, so this is most likely why there is a dip in that age group.
Per capita income is the measure of the amount of money earned per person a geographic region. The formula is total income of area divided by the total population.
Answer: The Northern Hemisphere points towards the sun.
Explanation:
Summer solstice refers to two distinct times of the year, in either June the 20th or the 21st, when the Sun is farthest north in the Northern Hemisphere, and December 21st or the 22nd, when is farthest south in the Southern Hemisphere. During summer solstice in the northern hemisphere the one that gets more direct sunlight. It also signals the beginning of summer in the northern hemisphere and the start of winter in the southern hemisphere.