Wrong.  Quoting from your study where  it tries to explain rising population but slowing development of available land....  
"Many factors have contributed to the trend: changing demographics, changing lifestyles, the changing economy. Land use regulations alone have not brought about the slower rate of development at the urban edge. However, land use regulations and long term planning in our fast growing region remain important to protect agriculturally important and environmentally sensitive areas, and to ensure that the design of communities supports investments in transit and other forms of infrastructure. Loosening these regulations will only hinder progress towards these goals."
OK.  So we seem to have a lot of available land but unusually low utilization which they cannot explain.  Perhaps its the ridiculous regulations applied to actually develop the land?  Maybe the fees are extremely high?  Maybe the demands on housing stock assigned to the land tract are inappropriate?