The graph below shows people's level of satisfaction with the health care system in 4 countries between 1991 and 2007.
Summarise the information by selecting and reporting the main features, and make comparisons where relevant. Write at least 150 words.
![](https://daxue-oss.koocdn.com/upload/ti/sardine/2637000-2638000/2637133/6bfd587795464617b7a76fb249b57c46.png)