item 7 . management 2019s discussion and analysis of financial condition and results of operations executive summary international paper 2019s operating results in 2006 bene- fited from strong gains in pricing and sales volumes and lower operating costs . our average paper and packaging prices in 2006 increased faster than our costs for the first time in four years . the improve- ment in sales volumes reflects increased uncoated papers , corrugated box , coated paperboard and european papers shipments , as well as improved revenues from our xpedx distribution business . our manufacturing operations also made solid cost reduction improvements . lower interest expense , reflecting debt repayments in 2005 and 2006 , was also a positive factor . together , these improvements more than offset the effects of continued high raw material and distribution costs , lower real estate sales , higher net corporate expenses and lower con- tributions from businesses and forestlands divested during 2006 . looking forward to 2007 , we expect seasonally higher sales volumes in the first quarter . average paper price realizations should continue to improve as we implement previously announced price increases in europe and brazil . input costs for energy , fiber and chemicals are expected to be mixed , although slightly higher in the first quarter . operating results will benefit from the recently completed international paper/sun paperboard joint ventures in china and the addition of the luiz anto- nio paper mill to our operations in brazil . however , primarily as a result of lower real estate sales in the first quarter , we anticipate earnings from continuing operations will be somewhat lower than in the 2006 fourth quarter . significant steps were also taken in 2006 in the execution of the company 2019s transformation plan . we completed the sales of our u.s . and brazilian coated papers businesses and 5.6 million acres of u.s . forestlands , and announced definitive sale agreements for our kraft papers , beverage pack- aging and arizona chemical businesses and a majority of our wood products business , all expected to close during 2007 . through december 31 , 2006 , we have received approximately $ 9.7 billion of the estimated proceeds from divest- itures announced under this plan of approximately $ 11.3 billion , with the balance to be received as the remaining divestitures are completed in the first half of 2007 . we have strengthened our balance sheet by reducing debt by $ 6.2 billion , and returned value to our shareholders by repurchasing 39.7 million shares of our common stock for approximately $ 1.4 billion . we made a $ 1.0 billion voluntary contribution to our u.s . qualified pension fund . we have identified selective reinvestment opportunities totaling approx- imately $ 2.0 billion , including opportunities in china , brazil and russia . finally , we remain focused on our three-year $ 1.2 billion target for non-price profit- ability improvements , with $ 330 million realized during 2006 . while more remains to be done in 2007 , we have made substantial progress toward achiev- ing the objectives announced at the outset of the plan in july 2005 . results of operations industry segment operating profits are used by inter- national paper 2019s management to measure the earn- ings performance of its businesses . management believes that this measure allows a better under- standing of trends in costs , operating efficiencies , prices and volumes . industry segment operating profits are defined as earnings before taxes and minority interest , interest expense , corporate items and corporate special items . industry segment oper- ating profits are defined by the securities and exchange commission as a non-gaap financial measure , and are not gaap alternatives to net income or any other operating measure prescribed by accounting principles generally accepted in the united states . international paper operates in six segments : print- ing papers , industrial packaging , consumer pack- aging , distribution , forest products and specialty businesses and other . the following table shows the components of net earnings ( loss ) for each of the last three years : in millions 2006 2005 2004 .

2006: industry segment operating profits: 2074
corporate items net: -746
corporate special items*: 2373
interest expense net: -521
minority interest: -9
income tax ( provision ) benefit: -1889
discontinued operations: -232
net earnings ( loss ): 1050
2005: industry segment operating profits: 1622
corporate items net: -607
corporate special items*: -134
interest expense net: -595
minority interest: -9
income tax ( provision ) benefit: 407
discontinued operations: 416
net earnings ( loss ): 1100
2004: industry segment operating profits: 1703
corporate items net: -477
corporate special items*: -141
interest expense net: -712
minority interest: -21
income tax ( provision ) benefit: -114
discontinued operations: -273
net earnings ( loss ): -35

* corporate special items include gains on transformation plan forestland sales , goodwill impairment charges , restructuring and other charges , net losses on sales and impairments of businesses , insurance recoveries and reversals of reserves no longer required. .

Questions:
what was the change in industry segment operating profits from 2004 to 2005?
and how much did this change represent in relation to those profits in 2004, in percentage?
and over the subsequent year, what was that change in the operating profits?
and what is this change as a percentage of the 2005 operating profits?

Answers:
-81
-5%
452
28%