Question 66140
You are only interested in the change from 1950 to 1997. That means that you can ignore most of your table.

Year   United States Canada Europe Japan  Other World Total
1997   12,119        2,571  17,773 10,975 10,024      53,463
1950    8,006          388   1,991     32    160      10,577
Change  4,113        2,183  15,782  10943  9,864      42,886

To find the percentage increase use
{{{(Change/Original value)* 100}}}
So for the US
{{{(4113/8006)*100=51}}}%
Calculate the rest in the same way then use your percentage increases to answer the questions.