%Y/M   Jan     Feb    Mar    Apr   May    Jun    Jul    Aug    Sep    Oct    Nov    Dec   mean
2015.0    999.0    999.0    999.0    999.0    999.0    999.0    999.0    313.7    319.4    319.1    315.5    308.8    315.3    
2016.0    303.0    307.9    307.0    306.1    309.4    316.9    316.3    320.9    317.1    320.3    316.3    999.0    312.8    
2017.0    999.0    302.2    311.4    311.1    307.3    315.9    999.0    999.0    999.0    999.0    999.0    999.0    309.6    
2018.0    307.9    309.6    305.0    315.2    315.9    313.4    316.4    316.9    319.3    330.6    321.7    999.0    315.6    
2019.0    302.0    301.0    308.0    316.7    314.2    322.8    310.6    325.2    322.4    325.4    322.5    999.0    315.5    
2020.0    999.0    318.9    315.5    312.9    311.3    301.4    309.5    309.5    312.3    999.0    321.5    317.9    313.1    
2021.0    999.0    312.3    309.5    315.2    320.1    321.7    324.1    324.4    999.0    327.4    329.1    312.3    319.6    
2022.0    308.6    320.6    315.5    307.6    318.5    321.9    323.9    325.0    327.9    330.7    999.0    999.0    320.0    
2023.0    999.0    999.0    999.0    999.0    999.0    320.0    324.0    328.4    328.9    326.9    325.5    322.8    325.2    
2024.0    310.1    308.1    314.1    999.0    999.0    999.0    315.0    329.0    325.9    328.0    310.1    999.0    317.5