| Parameters | Value |
| Number of years | 49.00 |
| Minimum | 1.00 |
| Maximum | 96.20 |
| Average | 24.20 |
| Median | 20.00 |
| Standard deviation | 21.80 |
| Coefficient of variation (Cv) | 0.90 |
| Skewness coefficient of (Cs) | 1.53 |
| Kurtosis coefficient of (Ck) | 4.74 |