Study the graph below showing the lung cancer deaths and smoking rates in UK and answer the following question:

Describe how the number of cigarettes smoked per year by males changed between $1911$ and $2001$.

Suggest explanations for the following statement: 

People who smoke cigarettes usually find it very difficult to give up. 

Suggest explanations for the following statement:

Heroin users have a high risk of getting HIV/AIDS.

Suggest explanations for the following statement:

Passive smoking can cause lung cancer.

Study the graph below showing the lung cancer deaths and smoking rates in UK and answer the following question:

Describe how the number of cigarettes smoked per year by males changed between $1911$ and $2001$.

Study the graph below showing the lung cancer deaths and smoking rates in UK and answer the following question:

Describe how the number of deaths from lung cancer per year in males changed between $1911$ and $2001$.