根据下面的统计表回答问题:
抛图钉钉尖触地的概率的估计值是 .
0 165628 165636 165642 165646 165652 165654 165658 165664 165666 165672 165678 165682 165684 165688 165694 165696 165702 165706 165708 165712 165714 165718 165720 165722 165723 165724 165726 165727 165728 165730 165732 165736 165738 165742 165744 165748 165754 165756 165762 165766 165768 165772 165778 165784 165786 165792 165796 165798 165804 165808 165814 165822 366461
| 抛图钉的次数 | 760 | 800 | 840 | 880 | 920 | 960 | 1000 | 1040 |
| 钉尖触地的频数 | 347 | 366 | 383 | 401 | 421 | 445 | 463 | 481 |
| 钉尖触地的频率 | 45.7% | 45.8% | 45.6% | 45.6% | 45.8% | 46.4% | 46.3% | 46.3% |