Consider the following table data for selected competitors in the global eyeglasses industry.

Particulars	2009	2010	2011	2012	2013
Luxottica Group SpA	3,923	4,211.30	4,604.20	4,896.60	5,015.60
Essilor International SA	3,604.20	4,112.40	4,274.10	4,514	4,647.40
Safilo Group SpA	1,312.50	1,418.80	1,472.20	1,499.10	1,425.70
Carl Zeiss AG	642.2	668.20	703.90	717.6	770.30
Marchon Eyewear Inc	865.1	762.80	771.20	771.3	766.20
Hoya Corp	528.9	585.20	601.60	636.1	720.10
Total	10,875.90	11,758.70	12,427.20	13,034.70	13,345.30

The 3-firm concentration ratio for the 2013 market share equals.

Please do not copy from chegg otherwise i have to report the answer. Explain the answer throughly with showing each step of the calculation.