mean and std proj. (Michel and Riviere, 2011) 19790111_00 to 20191231_18
AT ZO ScTr AR EuBL ScBL GL 
mean  -0.0023841809 -0.0078344550 -0.0015250760  0.0021150061  0.0042730025  0.0089835953  0.0049633454
stdv   0.1711293906  0.2818541229  0.2004271448  0.2492269725  0.2292326987  0.2332117558  0.3415428102

