GiGana Manufacturers produces garments for the export market. The table below reflects manufacturing data for the last four years: 2016 2017 2018 2019 No of Ladies Dresses produced 250 000 300 000 320 000 350 000 No of Men's Shirts produced 125 000 185 000 210 000 250 000 No of Girl's tops produced 350 750 450 500 510 600 520 500 No. of workers employed 90 150 190 220 Working hours per day 8 8 8 8 Working days per annum 244 240 266 290. Calculate the four-year labor productivity index. (Work to 2 decimal places)