The complexity of information systems is increasing in recent years, leading to increased effort for maintenance and configuration.
A distinctly American — and originally pagan — holiday, Halloween's global reach has been increasing in recent decades.
The number of tornadoes has not been increasing in recent decades.
According to one study cited by Mr. Krueger, the heritability of status has been increasing in recent decades.
Urban and rural protests have been increasing in recent years, fuelled by official wrongdoing such as corruption and land grabs.
Student borrowing has been increasing in recent years, as tuition has grown faster than inflation or family income.
Seal numbers around the Murray Lakes and the Coorong, south of Adelaide, have been increasing in recent years and are now estimated at more than 100,000.
Black voter participation has been increasing in recent presidential elections, and 57percentt of eligible black voters turned out in 2000, according to the Census Bureau.
The number of diesel vehicles on the capital's streets has been increasing in recent years, according to research published earlier this year.
The proportion of officers holding important command positions with firsthand experience in planning for a conflict over Taiwan has been increasing in recent years, experts say.
Moreover, the length of delays in breast cancer diagnosis in cases that lead to malpractice litigation has been increasing in recent years.
