{"tk":21.521,"bk":-0.171} {"tk":22.012,"bk":-0.169} {"tk":22.512,"bk":-0.166} {"tk":23.003,"bk":-0.159} {"tk":23.507,"bk":-0.164} {"tk":23.999,"bk":-0.165} {"tk":24.513,"bk":-0.156} {"tk":25.002,"bk":-0.157} {"tk":25.503,"bk":-0.159} {"tk":26.01,"bk":-0.161} {"tk":26.511,"bk":-0.16}