I would have said that defining the STEP parameter for the xAxis would be rather straightforward. But there are weird things happening with my graphs. One thing is that although I am assigning a STEP value of 1, it only displays every fifth year. If I increase the value to 2, it displays every tenth year.
This is the setting (with a fiddle here):
"xAxis": {
"labels": {
"step": 1
},
"tickWidth": 0,
"showFirstLabel": true,
"showLastLabel": true
},
Thanks for any help on this!