Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | Competition | Date | Surface | Location | Score | Result |
| --- | --- | --- | --- | --- | --- | --- |
| 2007.0 | Europe/Africa Zone Group I Pool C | 18 Apr | clay | Plovdiv , Bulgaria | 3 : 0 | Won |
| 2007.0 | Europe/Africa Zone Group I Pool C | 19 Apr | clay | Plovdiv , Bulgaria | 1 : 2 | Lost |
| 2007.0 | Europe/Africa Zone Group I Pool C | 20 Apr | clay | Plovdiv , Bulgaria | 2 : 1 | Won |
| 2007.0 | Europe/Africa Zone Group I Play-offs | 21 Apr | clay | Plovdiv , Bulgaria | 2 : 1 | Won |
| 2007.0 | World Group II Play-offs | 14–15 Jul | hard | Košice , Slovakia | 1 : 4 | Lost |
| 2008.0 | Europe/Africa Zone Group I Pool D | 31 Jan | carpet | Budapest , Hungary | 2 : 1 | Won |
| 2008.0 | Europe/Africa Zone Group I Pool D | 1 Feb | carpet | Budapest , Hungary | 2 : 1 | Won |
| 2008.0 | Europe/Africa Zone Group I Play-offs | 2 Feb | carpet | Budapest , Hungary | 2 : 0 | Won |
| 2008.0 | World Group II Play-offs | 26–27 Apr | hard | Zagreb , Croatia | 3 : 2 | Won |
| 2009.0 | World Group II | 7–8 Feb | hard | Belgrade , Serbia | 4 : 1 | Won |
| 2009.0 | World Group Play-offs | 25–26 Apr | clay | Lleida , Spain | 4 : 0 | Won |
| 2010.0 | World Group 1st Round | 6–7 Feb | hard | Belgrade , Serbia | 2 : 3 | Lost |
| 2010.0 | World Group Play-offs | 24–25 Apr | clay | Belgrade , Serbia | 2 : 3 | Lost |
| 2011.0 | World Group II | 5–6 Feb | hard | Novi Sad , Serbia | 3 : 2 | Won |
| 2011.0 | World Group Play-offs | 16–17 Apr | clay | Bratislava , Slovakia | 3 : 2 | Won |
| 2012.0 | World Group 1st Round | 4–5 Feb | hard | Charleroi , Belgium | 3 : 2 | Won |
| 2012.0 | World Group Semifinals | 21–22 Apr | clay | Moscow , Russia | 3 : 2 | Won |
| 2012.0 | World Group Final | 3–4 Nov | hard | Prague , Czech Republic | 1 : 3 | Runner-up |
| 2013.0 | World Group 1st Round | 9–10 Feb | hard | Niš , Serbia | 2 : 3 | Lost |
| 2013.0 | World Group Play-offs | 20–21 Apr | clay | Stuttgart , Germany | 2 : 3 | Lost |
Question:
How many years have a Surface of clay, and a Score of 4 : 0?
Answer:
1.0