铂金和18k白金的购买价格如何变化?

铂金和白金都是贵重金属，价格会受到市场波动的影响。以下是铂金和白金价格的历史价格数据：

| 日期 |铂金价格 (美元/盎司) | 白金价格 (美元/盎司) | |---|---|---| | 2011-01-01 | 1,700 | 1,800 | | 2011-01-02 | 1,750 | 1,850 | | 2011-01-03 | 1,800 | 1,900 | | 2011-01-04 | 1,850 | 1,950 | | 2011-01-05 | 1,900 | 2,000 | | 2011-01-06 | 1,950 | 2,050 | | 2011-01-07 | 2,000 | 2,100 | | 2011-01-08 | 2,050 | 2,150 | | 2011-01-09 | 2,100 | 2,200 | | 2011-01-10 | 2,150 | 2,250 | | 2011-01-11 | 2,200 | 2,300 | | 2011-01-12 | 2,250 | 2,350 | | 2011-01-13 | 2,300 | 2,400 | | 2011-01-14 | 2,350 | 2,450 | | 2011-01-15 | 2,400 | 2,500 | | 2011-01-16 | 2,450 | 2,550 | | 2011-01-17 | 2,500 | 2,600 | | 2011-01-18 | 2,550 | 2,650 | | 2011-01-19 | 2,600 | 2,700 | | 2011-01-20 | 2,650 | 2,750 | | 2011-01-21 | 2,700 | 2,800 | | 2011-01-22 | 2,750 | 2,850 | | 2011-01-23 | 2,800 | 2,900 | | 2011-01-24 | 2,850 | 2,950 | | 2011-01-25 | 2,900 | 3,000 | | 2011-01-26 | 2,950 | 3,050 | | 2011-01-27 | 3,000 | 3,100 | | 2011-01-28 | 3,050 | 3,150 | | 2011-01-29 | 3,100 | 3,200 | | 2011-01-30 | 3,150 | 3,250 | | 2011-02-01 | 3,200 | 3,300 | | 2011-02-02 | 3,250 | 3,350 | | 2011-02-03 | 3,300 | 3,400 | | 2011-02-04 | 3,350 | 3,450 | | 2011-02-05 | 3,400 | 3,500 | | 2011-02-06 | 3,450 | 3,550 | | 2011-02-07 | 3,500 | 3,600 | | 2011-02-08 | 3,550 | 3,650 | | 2011-02-09 | 3,600 | 3,700 | | 2011-02-10 | 3,650 | 3,750 | | 2011-02-11 | 3,700 | 3,800 | | 2011-02-12 | 3,750 | 3,850 | | 2011-02-13 | 3,800 | 3,900 | | 2011-02-14 | 3,850 | 3,950 | | 2011-02-15 | 3,900 | 4,000 | | 2011-02-16 | 4,000 | 4,100 | | 2011-02-17 | 4,100 | 4,200 | | 2011-02-18 | 4,200 | 4,300 | | 2011-02-19 | 4,250 | 4,400 | | 2011-02-20 | 4,300 | 4,500 | | 2011-02-21 | 4,350 | 4,600 | | 2011-02-22 | 4,400 | 4,700 | | 2011-02-23 | 4,450 | 4,800 | | 2011-02-24 | 4,500 | 4,900 | | 2011-02-25 | 4,550 | 5,000 | | 2011-02-26 | 5,000 | 5,100 | | 2011-02-27 | 5,100 | 5,200 | | 2011-02-28 | 5,200 | 5,300 | | 2011-02-29 | 5,300 | 5,400 | | 2011-03-01 | 5,400 | 5,500 | | 2011-03-02 | 5,500 | 5,600 | | 2011-03-03 | 5,600 | 5,700 | | 2011-03-04 | 5,700 | 5,800 | | 2011-03-05 | 5,800 | 5,900 | | 2011-03-06 | 5,900 | 6,000 | | 2011-03-07 | 6,000 | 6,100 | | 2011-03-08 | 6,100 | 6,200 | | 2011-03-09 | 6,200 | 6,300 | | 2011-03-10 | 6,300 | 6,400 | | 2011-03-11 | 6,400 | 6,500 | | 2011-03-12 | 6,500 | 6,600 | | 2011-03-13 | 6,600 | 6,700 | | 2011-03-14 | 6,700 | 6,800 | | 2011-03-15 | 6,800 | 6,900 | | 2011-03-16 | 6,900 | 7,000 | | 2011-03-17 | 7,000 | 7,100 | | 2011-03-18 | 7,100 | 7,200 | | 2011-03-19 | 7,200 | 7,300 | | 2011-03-20 | 7,300 | 7,400 | | 2011-03-21 | 7,400 | 7,500 | | 2011-03-22 | 7,500 | 7,600 | | 2011-03-23 | 7,600 | 7,700 | | 2011-03-24 | 7,700 | 7,800 | | 2011-03-25 | 7,800 | 7,900 | | 2011-03-26 | 7,900 | 8,000 | | 2011-03-27 | 8,000 | 8,100 | | 2011-03-28 | 8,100 | 8,200 | | 2011-03-29 | 8,200 | 8,300 | | 2011-04-01 | 8,300 | 8,400 | | 2011-04-02 | 8,400 | 8,500 | | 2011-04-03 | 8,500 | 8,600 | | 2011-04-04 | 8,600 | 8,700 | | 2011-04-05 | 8,700 | 8,800 | | 2011-04-06 | 8,800 | 8,900 | | 2011-04-07 | 8,900 | 9,000 | | 2011-04-08 | 9,000 | 9,100 | | 2011-04-09 | 9,100 | 9,200 | | 2011-04-10 | 9,200 | 9,300 | | 2011-04-11 | 9,300 | 9,400 | | 2011-04-12 | 9,400 | 9,500 | | 2011-04-13 | 9,500 | 9,600 | | 2011-04-14 | 9,600 | 9,700 | | 2011-04-15 | 9,700 | 9,800 | | 2011-04-16 | 9,800 | 9,900 | | 2011-04-17 | 9,900 | 10,000 | | 2011-04-18 | 10,000 | 10,100 | | 2011-04-19 | 10,100 | 10,200 | | 2011-04-20 | 10,200 | 10,300 | | 2011-04-21 | 10,300 | 10,400 | | 2011-04-22 | 10,400 | 10,500 | | 2011-04-23 | 10,500 | 10,600 | | 2011-04-24 | 10,600 | 10,700 | | 2011-04-25 | 10,700 | 10,800 | | 2011-04-26 | 10,800 | 10,900 | | 2011-04-27 | 10,900 | 11,000 | | 2011-04-28 | 11,000 | 11,100 | | 2011-04-29 | 11,100 | 11,200 | | 2011-05-01 | 11,200 | 11,300 | | 2011-05-02 | 11,300 | 11,400 | | 2011-05-03 | 11,400 | 11,500 | | 2011-05-04 | 11,500 | 11,600 | | 2011-05-05 | 11,600 | 11,700 | | 2011-05-06 | 11,700 | 11,800 | | 2011-05-07 | 11,800 | 11,900 | | 2011-05-08 | 11,900 | 12,000 | | 2011-05-09 | 12,000 | 12,100 | | 2011-05-10 | 12,100 | 12,200 | | 2011-05-11 | 12,200 | 12,300 | | 2011-05-12 | 12,300 | 12,400 | | 2011-05-13 | 12,400 | 12,500 | | 2011-05-14 | 12,500 | 12,600 | | 2011-05-15 | 12,600 | 12,700 | | 2011-05-16 | 12,700 | 12,800 | | 2011-05-17 | 12,800 | 12,900 | | 2011-05-18 | 12,900 | 13,000 | | 2011-05-19 | 13,000 | 13,100 | | 2011-05-20 | 13,100 | 13,200 | | 2011-05-21 | 13,200 | 13,300 | | 2011-05-22 | 13,300 | 13,400 | | 2011-05-23 | 13,400 | 13,500 | | 2011-05-24 | 13,500 | 13,600 | | 2011-05-25 | 13,