The given bar chart indicates the data of car ownership in an European country over a 40-year period starting from 1971.
Overall, the proportion of households owning one or two cars witnessed an upward trend while the opposite was true for those without car. It is also noticeable that although in 1971, most of family did not have a car, nearly a half of the population in this country owned a car in the last year of the survey.
In 1971, the percentage of households having no car and one car were approximately 50% and 17%, respectively. After 30 years, the former experienced a substantial decrease by nearly 20% and remained stable in the next 10 years. Experiencing an opposite pattern, the figure for the latter rose moderately to about 30% in 2001, despite a 10% decline in 1991.
Regarding the household owning two cars, in 1981, its proportion slightly went down by roughly 1% reached its lowest level at just about 25%, followed by a soar to around 50% in the next 10 years. However, this figure recorded a marginal drop of about 3% in 2001.