41. The country's mining and quarrying industries continued to struggle in 1997 based on the slump noted in their real gross value . 42. The gross value of all sectors is then added to get the gross value added ( GVA ) at factor cost. 43. An example of a tax that was levied includes the " quinto ", a 20 % severance tax on gross value . 44. The gross value of construction work performed by contractors at locations other than construction sites rose 11 . 4 per cent. 45. The gross value of the forestry sector in 1997 went down 15 . 2 % from P900 million a year ago. 46. The Blue Book 2013 reports that this sector added gross value of ?1, 380 million to the UK economy in 2011. 47. The Blue Book 2013 reports that this sector added gross value of ?3, 289 million to the UK economy in 2011. 48. The gross value of all sectors is then added to get the gross value added ( GVA ) at factor cost. 49. The gross value of construction work performed for these projects was $ 36.2 billion in 1997, an increase of 35 per cent. 50. The Blue Book 2013 reports that " Agriculture " added gross value of ?, 438 million to the UK economy in 2011.
