Either their share of world consumption must grow or their share of world production will stop growing.
The opinion here is that media companies adjust to technology disruption slowly, defiantly, and that they often intensify their own problems in a copy-share world.
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The biggest companies in the world have less than 5% share of world production, and it rapidly steps down from there.
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Finally, you say that the world's 600m poorest people saw their share of world income fall between 1988 and 1993 not because of globalisation but because of economic isolation.
India, with about 17% of world population and a current 3.6% share of world oil consumption might add a percent or two.
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We know the world is changing as evidenced by the continuous erosion of the U.S. share of world market capitalization.
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Europe's national leaders are not ready to share the world stage with real rivals.
Its share of world output and exports surged during the 1980s and early 1990s.
At the moment, of course, renewables are still a tiny share of world energy.
Their share of world energy supply has stayed barely changed over the past three decades, at around 11%.
The share of world production being apportioned to US consumption has been falling.
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Between 2005 and 2009 Germany's share of world exports grew, whereas France's shrank.
Since 2000 its share of world imports has dropped from 19% to 14%.
During the 1990s, Egypt's share of world trade, already puny, fell by 20%.
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Natural gas has upped its share of world energy supply to one-fifth (2.3 Btoe), from one-sixth (1 Btoe) in 1973.
That would beat America's 18% share of world exports in the early 1950s, a figure that has since dropped to 8%.
Optimists think Germany can keep its share of world trade, which grows twice as fast as global output, and thus stay ahead.
If differences in prices among countries are taken into account, its share of world GDP has gone from 26% in 1990 to 38% in 2007.
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China's rising share of world exports will command much more attention.
Its 13% share of world browser usage is startlingly high considering that to run Firefox you have to find the Firefox Web site and download the software yourself.
So if, for instance, its numbers show China's share of world Internet users is half what the CIA's numbers show, Net Applications would count each Chinese browser in its data twice.
But the share of world sea cargo that passes through it has dropped from 5.6% in 1970 to 3.4% in 2004, according to Pablo Armuelles of the University of Panama's Institute of Canal Studies.
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As for the popular belief that Asian producers are grabbing an ever-larger slice of exports, the region's 31% share of world exports last year was not much higher than in 1995 (28%) and remains smaller than western Europe's.
Analysis conducted by the KOF Institute, a Zurich-based consultancy, shows that the share of world population that forms the international market has grown from about 15-20% in the 1970s and 1980s to 95% in the first decade of the Millennium.
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An IMF working paper published in 2009 calculated that if China remained as dependent on exports as in recent years, then to sustain annual GDP growth of 8% its share of world exports would rise to about 17% by 2020.
According to a recent paper issued by the Council on Foreign Relations, U.S. military spending currently represents about 42 percent of the global total while the U.S. share of world economic output stands at 24 percent, suggesting the need for hundreds of billions of dollars in defense cuts every year to bring the two measures of power back into alignment.
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In pharmaceuticals, the Corange acquisition nudges Roche up from eighth to sixth in the world, with a 3.3% share of the world's drugs market.
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