what is the total number of divisions on the chart?
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col : season | tier | division | place row 1 : 1970–01 | 6 | regional | — row 2 : 2001/02 | 6 | 1ª reg. | — row 3 : 2002/03 | 5 | reg. pref. | 11th row 4 : 2003/04 | 5 | reg. pref. | 9th row 5 : 2004/05 | 5 | reg. pref. | 1st row 6 : 2005/06 | 4 | 3ª | 20th row 7 : 2006/07 | 5 | reg. pref. | 3rd row 8 : 2007/08 | 5 | reg. pref. | 1st row 9 : 2008/09 | 4 | 3ª | 16th row 10 : 2009/10 | 4 | 3ª | 17th row 11 : 2010/11 | 4 | 3ª | 18th row 12 : 2011/12 | 5 | reg. pref. | 2nd
what is the total number of divisions on the chart?
Season Tier Division Place
1970–01 6 Regional —
2001/02 6 1ª Reg. —
2002/03 5 Reg. Pref. 11th
2003/04 5 Reg. Pref. 9th
2004/05 5 Reg. Pref. 1st
2005/06 4 3ª 20th
2006/07 5 Reg. Pref. 3rd
2007/08 5 Reg. Pref. 1st
2008/09 4 3ª 16th
2009/10 4 3ª 17th
2010/11 4 3ª 18th
2011/12 5 Reg. Pref. 2nd
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