请问这种数据怎么做因子分析，贡献度才53左右，怎么回事

KMO and Bartlett's Test

Kaiser-Meyer-Olkin Measure of Sampling Adequacy.

.846

Bartlett's Test of Sphericity

Approx. Chi-Square

806.077

df

45

Sig.

.000

Total Variance Explained

Initial Eigenvalues

Extraction Sums of Squared Loadings

Rotation Sums of Squared Loadings

Total

% of Variance

Cumulative %

Total

% of Variance

Cumulative %

Total

% of Variance

Cumulative %

3.911

39.111

39.111

3.911

39.111

39.111

2.909

29.091

29.091

1.473

14.728

53.839

1.473

14.728

53.839

2.475

24.748

53.839

.910

9.102

62.941

.765

7.648

70.589

.648

6.475

77.064

.565

5.647

82.712

.519

5.188

87.899

.448

4.477

92.376

.404

4.038

96.414

.359

3.586

100.000

Extraction Method: Principal Component Analysis.