The national average cost for one year of auto insurance premiums so far in 2010 is $1,566. The average cost for auto insurance nationwide for 2008 was $1,600. The national annual average cost in 2009 was $1,736. CPI helps you understand car insurance premium trends so you can shop and save at the right time.

You can review the CarInsurance.com Premium Index - CPI at any time to learn more about average premiums.

Learn more about costs for every driver group:

• Average Annual Car Insurance Cost for Teens
  Teenagers pay the highest premiums of all groups of drivers.
• Average Annual Auto Insurance Rates for Seniors
  Senior Citizens pay the lowest premiums of all groups of drivers.
• Established Families Average Annual Premiums
  Established families pay less than the national average for car insurance.
• Married Annual Rates - Average Rate Comparison
  Married drivers pay less than single drivers for auto insurance.
• Students Insurance Costs - Comparison
  Students pay a little more than the national average cost of car insurance, but this is likely because of their age. Students pay less than those drivers not in school.
• Annual Auto Rates for Young Families
  Young families pay less than the average cost of car insurance as a group.

While CPI doesn't currently report a breakdown of the nationwide statistics on the average price of motor vehicle insurance by age groups, we can tell you that typically teenager drivers and drivers under 25 years of age have some of the highest auto insurance premiums. Young drivers have proven to be high-risk drivers for insurance companies due to the high rate of accidents and their inexperience to operate a vehicle.

Male drivers under the age of 25 typically have the highest premiums. Females normally cost a bit less to insure because of statistics showing they are not as aggressive behind the wheel. If you are under 25 and married t is likely that your rates would be a little lower than a single driver of the same age.

Where you live in the United States will also affect your rates. Many state insurance regulators (Departments of Insurance office) have comparison charts of rates that consumers can download. Often this data includes rates for different areas of the state as well as for different age groups. If you were interested in finding out the average cost for auto insurance for 18 to 25 year old drivers in your particular state, we would recommend contacting your state's Department of Insurance. Alternatively, f you have 6 minutes, get an online car insurance quote at CarInsurance.com and see what the cost is if an 18-25 year old.

You can compare this month's average premiums in every state (including 18 to 25 year olds), compared to the national average cost of car insurance.

To see if new statistical data has been gathered that shows the average cost of auto insurance for different age groups nationwide you may want to review CPI. CPI will soon include age graphing, gender segmenting, number of drivers, and average for the amount of vehicles on a quote.