.getFullYear().toString().substring(2);
                            }
                        }
                    }
                },
                valueAxis:
                {
                    title: { text: 'Price per share [USD]<br><br>' },
                    labels: { horizontalAlignment: 'right' }
                },

                colorScheme: 'scheme01',
                seriesGroups:
                    [
                        {
                            type: 'line',
  