Frequency Table (Histogram)
Bins	Midpoint	Abs. Frequency	Rel. Frequency	Cumul. Rel. Freq.	Density
[1820,1840[	1830	12	0.2	0.2	0.01
[1840,1860[	1850	10	0.166667	0.366667	0.008333
[1860,1880[	1870	9	0.15	0.516667	0.0075
[1880,1900[	1890	5	0.083333	0.6	0.004167
[1900,1920[	1910	0	0	0.6	0
[1920,1940[	1930	5	0.083333	0.683333	0.004167
[1940,1960[	1950	8	0.133333	0.816667	0.006667
[1960,1980[	1970	10	0.166667	0.983333	0.008333
[1980,2000]	1990	1	0.016667	1	0.000833