* Generally lower than today: In most developed countries, the average level of education in the early 1960s was considerably lower than it is today. High school completion was not as common, and college education was far less prevalent, especially for women.
* Gender gap: A significant gender gap existed. Men consistently had higher rates of high school and college completion than women. This disparity was a product of societal expectations and limited opportunities for women's education.
* Variations by country: Developed nations in Western Europe and North America had higher average education levels than developing nations. Even within a single country, significant regional variations existed based on socioeconomic factors.
To get specific data, you would need to specify a country and consult historical census data or educational statistics for that nation. The US Census Bureau, Statistics Canada, and similar national statistical offices would be good resources for finding the data for specific countries.