Years since operation

Start number

Fail number

Died

Lost

Revised but not loose

Number at risk at end of period

Survival rate%

95% CI

0 to 1

228

2

5

0

4

223.5

99.1

100 to 100

1 to 2

217

0

8

0

2

212

99.1

99.1 to 99.1

2 to 3

207

0

5

2

1

203

99.1

99.1 to 99.1

3 to 4

199

0

7

0

0

195.5

99.1

99.1 to 99.1

4 to 5

192

2

5

1

1

188.5

98

99.1 to 99.1

5 to 6

183

0

8

0

0

179

98

96.1 to 99.9

6 to 7

175

0

9

3

0

169

98

96.1 to 99.9

7 to 8

163

1

14

1

1

155

97.4

96.1 to 99.9

8 to 9

146

1

6

0

0

136

96.7

94.7 to 100

9 to 10

125

0

3

0

0

113.5

96.7

93.5 to 100

10 to 11

102

3

5

0

0

85.5

93.2

92.9 to 100

11 to 12

66

1

2

2

0

59

91.5

87.3 to 99.4

12 to 13

51

0

1

1

0

44.5

91.5

83.9 to 99.6

13 to 14

38

0

3

0

0

28

91.5

82.1 to 100

14 to 15

18

0

4

0

0

13.5

91.5

77.7 to 100

15 to 16

9

0

1

0

0

7.5

91.5

72.9 to 100

16 to 17

6

0

1

0

0

5

91.5

68.7 to 100

17 to 18

4

0

0

0

0

3.5

91.5

64.2 to 100

18 to 19

3

0

0

0

0

1.5

91.5

49.6 to 100