By the middle of the 18th century, New England's population had grown dramatically, going from about 100,000 people in 1700 to 250,000 in 1725 and 375,000 in 1750 thanks to high birth rates and relatively high overall life expectancy. (A 15-year-old boy in 1700 could expect to live to about 63.) Colonists in Massachusetts, Connecticut, and Rhode Island continued to subdivide their land between farmers; the farms became too small to support single families, and this threatened the New England ideal of a society of independent yeoman farmers.