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Table 13 Obsolescence rate

From: Assessment of technological level of stem cell research using principal component analysis

Time lag (years)

Residual value (%)

Obsolescence rate (%)

0

100.0

0.0

1

92.8

7.2

2

86.1

13.9

3

79.9

20.1

4

74.1

25.9

5

68.7

31.3

6

63.8

36.2

7

59.2

40.8

8

54.9

45.1

9

50.9

49.1

11

43.8

56.2

12

40.7

59.3

13

37.7

62.3

14

35.0

65.0

15

32.5

67.5

16

30.1

69.9

17

27.9

72.1

18

25.9

74.1

19

24.1

75.9

20

20.7

79.3