Not every point on the graph was available in the studies I have read. I used more conservative numbers by using the lower estimates for the points that were given. Despite the chart being a rough estimate, it does reflect a very accurate trend line. Sometimes a visual can help people appreciate the differences which is why I created it.

Key points to consider:
Between 15% and 20% of American girls have had sex before age 14.
When a girl is 15 she has completed half of her freshman year of high school or is in her first semester of her sophomore year.
When an American girl reaches age 17, that is when they begin to attend proms. When they're 18 it's senior prom and then off to college as a freshman. Notice the steep decline once the American girls get past age 17.
By age 21 most sexually active American girls have had at least 9 sexual partners.
Many Russian and Ukrainians girls value long-term relationships. Many Russian and Ukrainian girls marry young which accounts for a good portion of the virginity loss. The virginity loss of American girls is attributed to them being sluts and their promiscuity.
At what age do most girls get married? (first marriage)
Americans: 26-32
Russia: 18-23
Ukraine: 18-21
The chart does not account for variables such as beauty, kindness, and femininity. Russian and Ukrainian virgins would be more beautiful than the average American virgin. When roughly 50% of American girls are overweight and many are unfeminine because of feminism, the outlook it much worse that you would ever find a beautiful American virgin. You would have better luck spinning a roulette wheel and landing on the one number you selected than finding a beautiful and feminine American virgin that wants a relationship with you, especially if there is an age difference (even of five to ten years assuming she is eighteen).
Many beautiful girls in Russia and Ukraine are taught about tradition, morals, and respecting themselves. The Orthodox Church in Russia takes an active role in shaping life in Russia by fighting against homosexuality and negative influences. Some Russian cities have banned Valentine's Day.
A reference informed me about 15-17% of Russian women remain virgins until they're 25-27.
At age 18 about 50% of Ukrainian girls are virgins, 45% of Russians, and 18% of Americans. By the time the girl has reached age 20 about 37% of Ukrainian girls, 30% of Russian girls, and 2% of American girls are virgins.