{"copper":2}
{"copper":2.4}
{"copper":2.5}
{"copper":2.6}
{"copper":2.6}
{"copper":2.7}
{"copper":2.7}
{"copper":2.8}
{"copper":3}
{"copper":3.1}
{"copper":3.2}
{"copper":3.3}
{"copper":3.3}
{"copper":3.4}
{"copper":3.6}
{"copper":3.6}
{"copper":3.6}
{"copper":3.7}
{"copper":4.4}
{"copper":4.6}
{"copper":4.7}
{"copper":4.8}
{"copper":5.3}
{"copper":10.1}