Passage: In addition to an existing installed capacity of 1.65 Gigawatts (GW) of hydro-electric schemes, Scotland has an estimated potential of 36.5 GW of wind and 7.5 GW of tidal power, 25% of the estimated total capacity for the European Union and up to 14 GW of wave power potential, 10% of EU capacity. The renewable electricity generating capacity may be 60 GW or more, considerably greater than the existing capacity from all Scottish fuel sources of 10.3 GW. Scotland exceeded its renewable energy target, set in 2007, for 31% of total power generation coming from renewables by 2011. Scotland eyes 50% renewable energy by 2030.In January 2006 the total installed electrical generating capacity from all forms of renewable energy was less than 2 GW, about a fifth of the total electrical production. By January 2007 wind power capacity, which has been growing rapidly, reached 1 GW capacity, and the total for renewables had grown to over 2.3 GW. By August 2009 wind power capacity was a fraction short of 1.5 GW and total renewables capacity had reached over 3.1 GW. By mid-2011 these figures were 2.76 GW and 4.6 GW respectively.In 2012, over 40% of Scotland's electricity came from renewable energy, and Scotland contributed almost 40% of the UK's renewables output. At the end of 2012, there was 5,801 megawatts (MW) of installed renewables electricity capacity in Scotland, an increase of 20.95% (1,005 MW) on the end of 2011. Renewable electricity generation in 2012 was a record high at 14,756 GWh – an increase of 7.3% on 2011, the previous record year for renewables output. The bulk of electricity production is derived from gas and oil. 2002 figures used in RSPB Scotland et al. (2006) are gas (34%), oil (28%), coal (18%) and nuclear (17%), with renewables 3% (principally hydro-electric), prior to the substantial growth in wind power output. It should be borne in mind that electricity production is only part of the overall energy use budget. In 2002, Scotland consumed a total of 175 Terawatt-hours (TWh) of energy in all forms,...

Question: how many figures were used ?
2002