For homicides, the rate used to be in steady decline, but it has crept back up and runs now at about 80 percent.

In the US, the rental rate used to be uniform across the country.

Table 4.7 shows that the discounting rate used is significant in ranking investments.

As every schoolboy knows - or at any rate used to think he knew - the Victorians were a prudish lot.

For the 2007-08 tax year the rates of tax you used depended on the level of your combined income and gains.

Our rate of children born underweight used to be under .01 percent.

His next step is to work out which rates of tax to use.

Follow the link below to see the rates to use and some examples.

We could combine the populations and standardize both rates using this (fictitious) age structure.

"And the rate increases, the more power we use?"