Append a ships table for a bubble chart
Correct handling of command line options
Simplify columns of a bubble chart
Add basic tests for a bubble chart
Append a tentative template for a bubble chart
Cause a ships table for a bubble chart to show an achievement rate as percentage
Give a proper title to a ships table for a bubble chart
Correct maximum and minimum value of a ships table for a bubble chart
Correct documentation
Correct an average level of a ship classification

It is a misunderstanding.
The calculation must treat all ships, include growing (non-practical) ships.
Make a ships table for a bubble chart reflect ignoring mothballs
Remove a doubled dot from a file name of a bubble chart of ships
Adapt behavior of a bubble chart to others

Note: "selectionMode" seemed to not work.
Mention a rounding error in calculation of an achievement rate
Adapt minimum values of ships charts to materials charts
Remove comma at end
Implement a chart option of a bubble chart for ships
Make a bubble chart for ships follow configurations on whether it has ticks

It is a bug that a bubble chart for ships cannot draw gridlines and minor gridlines, in the case of `chart.Ships.*.step` were not specified, whether or not `chart.Ships.*.gridlines` and `chart.Ships.*.minorGridlines` are specified.
Make a scatter chart for ships follow configurations on whether it has ticks

It is a bug that a scatter chart for ships cannot draw gridlines and minor gridlines, in the case of `chart.Ships.*.step` were not specified, whether or not `chart.Ships.*.gridlines` and `chart.Ships.*.minorGridlines` are specified.
Clarify that a chart option of a bubble chart is null