The 1665 census showed a significant imbalance in the gender ratio. While there were roughly 3,200 men, there were only around 800 women. This disparity was a major concern for the French authorities, as it hindered the growth and stability of the colony.
To address this issue, the French government implemented the "King's Daughters" program in 1663. This program brought hundreds of young women to New France as potential wives for the colonists. The program contributed to a more balanced gender ratio in subsequent censuses.
So, while we don't have specific data from a 1666 census, the 1665 census highlighted the overwhelmingly male population in New France and the efforts made to address the imbalance.