By 2010, four and one-half percent (4.5%) of electricity used shall be from renewable energy resources, with an additional one percent (1%) of electricity purchased or generated in each of the following years 2011, 2012, 2013, 2014; and an additional one and one-half percent (1.5%) of electricity purchased or generated in each of the following years 2015, 2016, 2017, 2018, and 2019, from renewable energy resources.
R.I. Gen. Laws § 37-8-17.1