No it hasn't.
Chickenpox has decreased significantly in the last 20 years in the US since chickenpox vaccine was approved in the US in 1995.
The use of quality circles has decreased significantly.
If no one votes in an election, there will be no winner since there are no votes to determine a victor. Elections usually require participation and votes to determine the outcome.
There is a higher incidence of autism among boys than girls. Since the new vaccine was approved, the incidence of the disease has decreased significantly.
there has been 10 Federal elections since 2007.
The average american spent about 4% of their budget on apparel in 2003. This percentage has significantly decreased since 1990 when the average was around 14%.
Since 1989, there have been thousands of elections all around the world for all sorts of positions.
Decreased
no
there have been 10 general elections since 1980
no
decreased