The 2003, 2005, 2007, 2009, 2011 and 2013 2019 datasets are all available on the UK Data Service:
SN 9146 Oxford Internet Survey, 2019
SN 9151 Oxford Internet Survey, 2013
SN 9074 Oxford Internet Survey, 2011
SN 9108 Oxford Internet Survey, 2009
SN 9139 Oxford Internet Survey, 2007
SN 9140 Oxford Internet Survey, 2005
SN 9141 Oxford Internet Survey, 2003