is the SPSS right? or i am not supposed to write '0' in any table

IT EO SLEEP * PERFORMANCE T 50 100.0% 0 0.0% 50 100.0% SLEEP . PERFORMANCE Crosstabulation PERFORMANCE EXCEPTIONA SATISFACTO GOOD RY ACCEPTABLE FAILED Total 'OS SLEEP EXCELLENT Count 8 0 8 Expected Count 3.2 2.4 1.0 8.0 GOOD Count 6 7 O 0 14 Expected Count 5.6 4.2 1.7 1.4 1.1 14.0 FAIR Count 5 7 14 Expected Count 5.6 4.2 1.7 1.4 1.1 14.0 POOR Count 3 9 'OS Expected Count 3.6 2.7 1.1 9.0 VERY BAD Count 0 0 5 u O Expected Count 2.0 1.5 5.0 Total Count 20 15 6 50 Expected Count 20.0 15.0 6.0 5.0 50.0 Chi-Square Tests Asymp. Sig. Value df (2-sided) Pearson Chi-Square 74.557 16 000 Likelihood Ratio 58.867 16 000 Linear-by-Linear 28.878 000 Association N of Valid Cases 50 a. 23 cells (92.0%) have expected count less than 5. The minimum expected count is .40