Cars is a very useful tool for every one which it can provides many services to their owners which it is make their daily movements very easy, suitably, and quickly as well. The families always find it necessary to have at least one car for their travelling needs or for their mobity.
In the example above which showing the number of cars that owns by one family in four spicific times in a sertain European country.
The number of families without a car was the big value in the year 1971 compared to the number of one or two cars which was nearly 50 percent, but this type decreased in the year 1981 to 42 percent, but still higher than the other types. In the years 1991 and 2001 the percentage of the families without a car was the same, 30 percent but it was in the second position in the year 2001 behind the percentage of families with one car.
The percentages of families with one car were unstable, which was 34 in the year 1971, 32 in the year 1981, 18 in the year 1991, and then jumped to 43 in the year 2001 to be in the first place.
Also the percentages of families with two cars were variable from period to other but in jeneral was in the third place behind the two types, which was 18 percent in the year 1971, 28 In the year 1981, 21 in the year 1991, and finally 31 in the year 2001