It's because people move out the city.
The population is Changing
Standards in all areas keep changing so they are not completely standard.
Essentially because the population keeps changing. Each electorate needs to have about the same amount of voting population, as the population moves hence they need to redraw electorate boundaries. By ensuring there are close to the same amount of people in each electorate nation wide, each persons vote is worth about the same.
Answering "Why does your computer keep changing the screen resolution in vista?"
use when you want to keep others from changing the worksheet (password)
That depends who you mean by "they"; also, what they are changing their mind about.
87,000 as of 2009, 2010 the population is changing gerasticly
fairness
It is changing because people cant have so many babies.
Alaska has 3 electoral votes. The number of electoral votes can change over time as the population of the state changes.
A developed country
increase productivity, revenue.. etc