Super Bowl commercials have increased dramatically in cost over the years, ranging from $293,000 in 1967 to over $3 million in 2009. Sharing of Super Bowl commercials on social media has increased engagement, with shares rising from 1 in 57 views in 2012 to 1 in 31 views in 2013. Shares are important because they help measure engagement and can influence purchase decisions by spreading through word of mouth and each share generating approximately 25 additional views. The most shared Super Bowl commercials of all time were Volkswagen's "The Force" in 2011 with 5.2 million shares and Budweiser's tributes in 2011 and 2013 with over 3 and 2.7 million shares respectively.