[Python] Python: How to specify values on axis?

This is my first python graph.

The following question is on plotting students percentage (0-100%). I am trying to set my x-axis values as [0, 10, 20 up to 100] and display bars in the intervals. The problem is the x-axis only gets 5 values and they are unsorted. I have to display data and plot a graph on each column of Excel sheet, that is why I have written the method.

I have attached this graph which I am getting from following code

import xlrd as x
import matplotlib.pyplot as plt1

excelFile = 'cal1.xls'
workBook = x.open_workbook(excelFile)
workSheet = workBook.sheet_by_name("Sheet1")
rows = workSheet.nrows
cols = workSheet.ncols

def getData_Excel(col):

list = []

for count in range(1, rows, 1):

list.append(workSheet.cell_value(count, col))
print("\nStudent ", count, " : ", list[count-1:count])

print()

return list

print("Students Matric Marks:")

matricData = [getData_Excel(3)]

matricLegend = ['Matric %']
plt1.hist(matricData, histtype = 'bar', color = 'blue', rwidth = 0.8)
plt1.xlabel('Percentage')
plt1.ylabel('Number of Students')
plt1.xticks(range(0, 110, 10))
plt1.yticks(range(0, 160, 20))
plt1.title("Matric Marks")
plt1.legend(matricLegend)
plt1.show()

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