WPR published an interactive map. It's better to look at the source
In which Countries do People have the Lowest Number of Sexual Partners on Average? There are also countries in which people tend to have far fewer sexual partners than the global average. This is typically due to societal or cultural preferences to abstain from premarital sex. In India, where many people follow strict marriage rules, the average person has three sexual partners during the course of his or her life. People who live in Hong Kong, Vietnam, and China tend to have fewer than four sexual partners during the course of their lives.
Missed it totally! India has only 3.
How many Sexual Partners does Someone from the United States Have? On average, people who live in the United States have between 10 and 11 sexual partners over the course of their lives. However, the average number of sexual partners a person in the US has can vary widely from state to state, based upon local cultures and religious preferences in particular. For example, residents of Louisiana report an average of 15.7 sexual partners. By comparison, the people of Utah, 62% of whom belong to the Church of Jesus Christ of Latter-day Saints, report an average of 2.6 sexual partners.
The age at which someone loses his or her virginity can also impact the number of sexual partners he or she has. In the United States, people tend to lose their virginity at 17 years of age, on average.