In that time, however, its total employment base has remained roughly constant at about 19,000.
International trade has doubled since 1995 while the number of people to handle inspections has remained roughly constant, he said.
The number of graduates from U.S. medical schools has remained roughly constant at about 16,000 a year since the 1980's.
Korda dryly points out that the public's tastes have remained roughly constant since the first best-seller list appeared in February 1895 in the literary magazine The Bookman.
Official Pentagon statistics indicate that after months of sharp improvements, the number of attacks on civilians and security forces has remained roughly constant since November.
The fraction of working-age adults who report a disability, about one in 10, has remained roughly constant for the past 20 years.
The agency's budget (about $1 billion a year) has remained roughly constant since last year, despite the fact that more than 300 workers were laid off and the frequency of recycling collection was halved.
But recent studies show most of the increase has come as the value of assets has increased and that asset management fees have remained roughly constant as a share of assets.
Counterterrorism officials continue to assess 2,000 individuals in the UK as posing a terrorist threat, a number that they say has remained roughly constant since the September 11 , 2001attacks on the US.
As of 2010, white families, on average, earned about $2 for every $1 that black and Hispanic families earned, a ratio that has remained roughly constant for the last 30 years.
One key difference between 2009 and 2012 is that there are more PCs worldwide, which could dilute the effect of new PCs - but the PC installed base in North America and Europe has remained roughly constant during that period, which would suggest that regions where Windows 8 might expect to be most quickly bought would have the same available number of buyers.
