management 2019s discussion and analysis value of the company 2019s obligation relating to asbestos claims under the ppg settlement arrangement . the legal settlements net of insurance included aftertax charges of $ 80 million for the marvin legal settlement , net of insurance recoveries of $ 11 million , and $ 37 million for the impact of the federal glass class action antitrust legal settlement . results of reportable business segments net sales segment income ( millions ) 2006 2005 2006 2005 .
the 2005 charge for asset impairments in the optical and specialty materials segment represented what percent of pre-impairment earnings for the segment?
industrial coatings sales increased $ 315 million or 11% ( 11 % ) in 2006 . sales increased 4% ( 4 % ) due to acquisitions , 4% ( 4 % ) due to increased volumes in the automotive , industrial and packaging coatings operating segments , 2% ( 2 % ) due to higher selling prices , particularly in the industrial and packaging coatings businesses and 1% ( 1 % ) due to the positive effects of foreign currency translation . segment income increased $ 65 million in 2006 . the increase in segment income was primarily due to the impact of increased sales volume , lower overhead and manufacturing costs , and the impact of acquisitions . segment income was reduced by the adverse impact of inflation , which was substantially offset by higher selling prices . performance and applied coatings sales increased $ 420 million or 16% ( 16 % ) in 2006 . sales increased 8% ( 8 % ) due to acquisitions , 4% ( 4 % ) due to higher selling prices in the refinish , aerospace and architectural coatings operating segments , 3% ( 3 % ) due to increased volumes in our aerospace and architectural coatings businesses and 1% ( 1 % ) due to the positive effects of foreign currency translation . segment income increased $ 50 million in 2006 . the increase in segment income was primarily due to the impact of increased sales volume and higher selling prices , which more than offset the impact of inflation . segment income was reduced by increased overhead costs to support growth in our architectural coatings business . optical and specialty materials sales increased $ 134 million or 15% ( 15 % ) in 2006 . sales increased 10% ( 10 % ) due to higher volumes , particularly in optical products and fine chemicals and 5% ( 5 % ) due to acquisitions in our optical products business . segment income increased $ 65 million in 2006 . the absence of the 2005 charge for an asset impairment in our fine chemicals business increased segment income by $ 27 million . the remaining $ 38 million increase in segment income was primarily due to increased volumes , lower manufacturing costs , and the absence of the 2005 hurricane costs of $ 3 million , net of 2006 insurance recoveries , which were only partially offset by increased overhead costs in our optical products business to support growth and the negative impact of inflation . commodity chemicals sales decreased $ 48 million or 3% ( 3 % ) in 2006 . sales decreased 4% ( 4 % ) due to lower chlor-alkali volumes and increased 1% ( 1 % ) due to higher selling prices . segment income decreased $ 28 million in 2006 . the year- over-year decline in segment income was due primarily to lower sales volumes and higher manufacturing costs associated with reduced production levels . the absence of the 2005 charges for direct costs related to hurricanes increased segment income by $ 29 million . the impact of higher selling prices ; lower inflation , primarily natural gas costs , and an insurance recovery of $ 10 million related to the 2005 hurricane losses also increased segment income in 2006 . our fourth-quarter chlor-alkali sales volumes and earnings were negatively impacted by production outages at several customers over the last two months of 2006 . it is uncertain when some of these customers will return to a normal level of production which may impact the sales and earnings of our chlor-alkali business in early 2007 . glass sales increased $ 15 million or 1% ( 1 % ) in 2006 . sales increased 1% ( 1 % ) due to improved volumes resulting from a combination of organic growth and an acquisition . a slight positive impact on sales due to foreign currency translation offset a slight decline in pricing . volumes increased in the performance glazings , automotive replacement glass and services and fiber glass businesses . automotive oem glass volume declined during 2006 . pricing was also up in performance glazings , but declined in the other glass businesses . segment income increased $ 25 million in 2006 . this increase in segment income was primarily the result of higher equity earnings from our asian fiber glass joint ventures , higher royalty income and lower manufacturing and natural gas costs , which more than offset the negative impacts of higher inflation , lower margin mix of sales and reduced selling prices . our fiber glass operating segment made progress during 2006 in achieving our multi-year plan to improve profitability and cash flow . a transformation of our supply chain , which includes production of a more focused product mix at each manufacturing plant , manufacturing cost reduction initiatives and improved equity earnings from our asian joint ventures are the primary focus and represent the critical success factors in this plan . during 2006 , our new joint venture in china started producing high labor content fiber glass reinforcement products , which will allow us to refocus our u.s . production capacity on higher margin , direct process products . the 2006 earnings improvement by our fiber glass operating segment accounted for the bulk of the 2006 improvement in the glass reportable business segment income . 20 2006 ppg annual report and form 10-k 4282_txt .