Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[60,80[	70	3	0.025	0.025	0.00125
[80,100[	90	28	0.233333	0.258333	0.011667
[100,120[	110	58	0.483333	0.741667	0.024167
[120,140[	130	18	0.15	0.891667	0.0075
[140,160[	150	6	0.05	0.941667	0.0025
[160,180[	170	6	0.05	0.991667	0.0025
[180,200]	190	1	0.008333	1	0.000417