Every parent looks forward to the day when they kids move out and are living on their own. But, for the first time in modern history, young adults are more likely to be living with their parents than on their own or with a spouse or domestic partneraccording to a new census analysis by the Pew Research Center.

Millennials have been slower than previous generations to marry and set up their own households. Researchers say the shift is primarily because of the dramatic decline in the number of young Americans who settle down romantically before the age of 35.

In recent decades fewer people have been getting married and those who do get married are marrying at older ages. In 1960 the average age for a first marriage was 20 for women and 22 for men, and just one in 10 people over 25 had never been married. Now the average ages are 27 for women and 29 for men, and one in five people over 25 has never been married.

In some cases the grown children’s not leaving can be because of their inability to cope with growing up and being on their own. They like being taken care of and don’t want to be independent. They are too spoiled.

Researchers also surmised that the recession of 2008 is still having an impact on where young people are living. Because of the weak job opportunities facing them, living at home means security.