Time (months)

0

2

4

6

8

10

12

Exercise at 10 (British)

125%

126%

128%

129%

131%

133%

278%

Selling at 10 (American)

127%

127%

127%

127%

127%

127%

127%

Exercise at 11 (British)

100%

98%

96%

93%

87%

73%

0%

Selling at 11 (American)

100%

98%

95%

91%

84%

70%

0%

Exercise at 12 (British)

78%

75%

71%

64%

54%

34%

0%

Selling at 12 (American)

78%

75%

70%

63%

52%

32%

0%

Exercise at 13 (British)

60%

56%

51%

43%

32%

14%

0%

Selling at 13 (American)

60%

56%

50%

42%

31%

13%

0%

Exercise at 14 (British)

46%

42%

36%

28%

18%

5%

0%

Selling at 14 (American)

46%

42%

36%

28%

17%

5%

0%

Exercise at 15 (British)

35%

31%

25%

18%

9%

2%

0%

Selling at 15 (American)

36%

31%

25%

18%

9%

2%

0%