Question: 中国银河的最大回撤，在2021年02月21日-2021年12月28日期间为多少？（取绝对值；单位：%）使用不复权价格，写出指标公式，搜集原始数据，计算得出答案，保留四位小数。注意列出原始数据和关键计算过程。
Formula: MDD = max_{t} (1 - P_t / max_{s \le t} P_s) * 100%
Data:
date,close
2021-02-22,10.73
2021-02-23,10.61
2021-02-24,10.64
2021-02-25,10.98
2021-02-26,10.77
2021-03-01,10.84
2021-03-02,10.66
2021-03-03,10.78
2021-03-04,10.46
2021-03-05,10.74
2021-03-08,10.59
2021-03-09,10.29
2021-03-10,10.23
2021-03-11,10.36
2021-03-12,10.38
2021-03-15,10.27
2021-03-16,10.42
2021-03-17,10.37
2021-03-18,10.29
2021-03-19,10.21
2021-03-22,10.38
2021-03-23,10.48
2021-03-24,10.59
2021-03-25,10.54
2021-03-26,10.57
2021-03-29,10.5
2021-03-30,10.56
2021-03-31,10.35
2021-04-01,10.41
2021-04-02,10.4
2021-04-06,10.41
2021-04-07,10.38
2021-04-08,10.5
2021-04-09,10.31
2021-04-12,10.12
2021-04-13,9.93
2021-04-14,10.03
2021-04-15,9.87
2021-04-16,10.01
2021-04-19,10.23
2021-04-20,10.11
2021-04-21,10.06
2021-04-22,10.1
2021-04-23,10.0
2021-04-26,9.78
2021-04-27,9.79
2021-04-28,9.76
2021-04-29,10.07
2021-04-30,9.98
2021-05-06,9.74
2021-05-07,9.7
2021-05-10,9.44
2021-05-11,9.66
2021-05-12,9.64
2021-05-13,9.57
2021-05-14,10.5
2021-05-17,10.17
2021-05-18,10.21
2021-05-19,10.23
2021-05-20,10.44
2021-05-21,10.21
2021-05-24,11.05
2021-05-25,11.31
2021-05-26,11.13
2021-05-27,11.1
2021-05-28,11.09
2021-05-31,11.17
2021-06-01,11.04
2021-06-02,10.8
2021-06-03,10.67
2021-06-04,10.71
2021-06-07,10.79
2021-06-08,10.81
2021-06-09,10.76
2021-06-10,10.74
2021-06-11,10.49
2021-06-15,10.34
2021-06-16,10.35
2021-06-17,10.32
2021-06-18,10.45
2021-06-21,10.44
2021-06-22,10.43
2021-06-23,10.47
2021-06-24,10.53
2021-06-25,10.83
2021-06-28,10.7
2021-06-29,10.61
2021-06-30,10.78
2021-07-01,10.29
2021-07-02,10.1
2021-07-05,10.07
2021-07-06,10.15
2021-07-07,10.13
2021-07-08,9.98
2021-07-09,10.01
2021-07-12,10.14
2021-07-13,10.14
2021-07-14,10.11
2021-07-15,9.98
2021-07-16,9.98
2021-07-19,9.96
2021-07-20,9.9
2021-07-21,10.02
2021-07-22,10.15
2021-07-23,10.31
2021-07-26,10.02
2021-07-27,9.72
2021-07-28,9.54
2021-07-29,9.55
2021-07-30,9.53
2021-08-02,9.83
2021-08-03,9.86
2021-08-04,9.84
2021-08-05,9.76
2021-08-06,9.77
2021-08-09,9.92
2021-08-10,10.06
2021-08-11,9.98
2021-08-12,9.94
2021-08-13,9.93
2021-08-16,9.97
2021-08-17,9.96
2021-08-18,10.51
2021-08-19,10.33
2021-08-20,10.3
2021-08-23,10.32
2021-08-24,10.51
2021-08-25,10.33
2021-08-26,10.3
2021-08-27,10.32
2021-08-30,10.11
2021-08-31,10.29
2021-09-01,10.79
2021-09-02,10.89
2021-09-03,11.1
2021-09-06,11.25
2021-09-07,11.25
2021-09-08,11.19
2021-09-09,11.38
2021-09-10,11.4
2021-09-13,11.31
2021-09-14,10.96
2021-09-15,11.01
2021-09-16,10.82
2021-09-17,10.9
2021-09-22,10.78
2021-09-23,11.06
2021-09-24,10.77
2021-09-27,10.55
2021-09-28,10.66
2021-09-29,10.53
2021-09-30,10.48
2021-10-08,10.62
2021-10-11,10.48
2021-10-12,10.25
2021-10-13,10.3
2021-10-14,10.3
2021-10-15,10.21
2021-10-18,10.29
2021-10-19,10.35
2021-10-20,10.23
2021-10-21,10.28
2021-10-22,10.25
2021-10-25,10.26
2021-10-26,10.07
2021-10-27,9.85
2021-10-28,9.84
2021-10-29,9.88
2021-11-01,10.69
2021-11-02,10.67
2021-11-03,10.66
2021-11-04,10.57
2021-11-05,10.87
2021-11-08,10.9
2021-11-09,10.97
2021-11-10,11.03
2021-11-11,11.38
2021-11-12,11.17
2021-11-15,10.8
2021-11-16,10.77
2021-11-17,10.76
2021-11-18,10.59
2021-11-19,10.77
2021-11-22,10.72
2021-11-23,10.82
2021-11-24,10.74
2021-11-25,10.72
2021-11-26,10.48
2021-11-29,10.38
2021-11-30,10.43
2021-12-01,10.54
2021-12-02,10.53
2021-12-03,10.63
2021-12-06,10.64
2021-12-07,10.85
2021-12-08,10.97
2021-12-09,11.1
2021-12-10,10.91
2021-12-13,10.8
2021-12-14,10.68
2021-12-15,10.83
2021-12-16,10.92
2021-12-17,10.82
2021-12-20,10.89
2021-12-21,11.05
2021-12-22,10.85
2021-12-23,11.1
2021-12-24,11.14
2021-12-27,11.02
2021-12-28,11.01

Indicator data:
Answer: 15.7383