It is not clear that social networking websites and online dating services are leading to the formation of long-term intimate relationships more efficiently. In 2000, a majority of U.S. households had personal computers, and in 2001, a majority of U.S. households had internet access. In 1995, Match.com was created, followed by eHarmony in 2000, Myspace and Plenty of Fish in 2003, Facebook and OkCupid in 2004, Zoosk in 2007, and Tinder in 2012. In 2011, the percentage of all U.S. adults who were married declined to a historic low at 51 percent, while from 2007 to 2017 the percentage of U.S. adults living without spouses or partners rose to 42 percent (including 61 percent of adults under the age of 35) because declines in marriage since 1960 (when 72 percent of U.S. adults were married) have not been offset by increases in cohabitation. In 2014, the percentage of U.S. adults above the age of 25 who had never married rose to a record one-fifth (with the rate of growth in the category accelerating since 2000). Additionally, psychologists Douglas T. Kenrick, Sara E. Gutierres, Laurie L. Goldberg, Steven Neuberg, Kristin L. Zierk, and Jacquelyn M. Krones have demonstrated experimentally that following exposure to photographs or stories about desirable potential mates, human subjects decrease their ratings of commitment to their current partners, while social psychologist David Buss has estimated that approximately 30 percent of the men on Tinder are married, and a significant criticism of Facebook has been its effect on its users' marriages.