Roman numerals: what is equivalent of cm?

Questions

Statistically speaking, the most dangerous job in the United States is that of ------------------?

In the United States, more than 25 percent of women's fashion dollars are spent on sizes ---- and up.?

Statistically, traveling by ------ is the safest means of transportation.?

In Wales, there are more --------- than people?

Although the United States has just 5 percent of the world's population, it has most of the world's lawyers at 70 percent. The American Bar Association has estimated that by 2000, the U.S. will have ------------------ lawyers.?