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:
| Height (m.) | No. of times visited | No. of HC climbs | First time as HC climb | Most recent |
| --- | --- | --- | --- | --- |
| 2744 | 2.0 | 2.0 | 2008.0 | 2011.0 |
| 1850/1860 | 29.0 | 25.0 | 1979.0 | 2013.0 |
| 2240 | 2.0 | 2.0 | 1997.0 | 2009.0 |
| 1655 | 2.0 | 1.0 | 2013.0 | 2013.0 |
| 1709 | 48.0 | 14.0 | 1980.0 | 2012.0 |
| 1755 | 3.0 | 3.0 | 2007.0 | 2012.0 |
| 1780 | 5.0 | 5.0 | 1998.0 | 2011.0 |
| 2715 | 4.0 | 2.0 | 1993.0 | 2008.0 |
| 1730 | 1.0 | 1.0 | 2001.0 | 2001.0 |
| 2067 | 16.0 | 8.0 | 1989.0 | 2012.0 |
| 2556/2645 | 56.0 | 19.0 | 1979.0 | 2011.0 |
| 1924 | 12.0 | 4.0 | 1981.0 | 2013.0 |
| 1501 | 1.0 | 1.0 | 2012.0 | 2012.0 |
| 2465 | 5.0 | 1.0 | 2009.0 | 2009.0 |
| 2413 | 1.0 | 1.0 | 1986.0 | 1986.0 |
| 1560 | 4.0 | 4.0 | 1994.0 | 2008.0 |
| 2770 | 5.0 | 2.0 | 1992.0 | 2007.0 |
| 1900 | 1.0 | 1.0 | 1993.0 | 1993.0 |
| 2360 | 32.0 | 6.0 | 1986.0 | 2011.0 |
| 1691 | 11.0 | 6.0 | 1981.0 | 2006.0 |
| 1980 | 4.0 | 4.0 | 1984.0 | 2002.0 |
| 1573 | 2.0 | 2.0 | 1996.0 | 2007.0 |
| 1160 | 1.0 | 1.0 | 1984.0 | 1984.0 |
| 2351 | 1.0 | 1.0 | 2008.0 | 2008.0 |
| 1715 | 8.0 | 8.0 | 1985.0 | 2011.0 |
| 1993 | 25.0 | 17.0 | 1980.0 | 2013.0 |
| 2083 | 5.0 | 1.0 | 1999.0 | 1999.0 |
| 2001 | 5.0 | 4.0 | 2005.0 | 2013.0 |
| 1669 | 9.0 | 4.0 | 1981.0 | 2005.0 |
| 1630 | 2.0 | 1.0 | 1980.0 | 1980.0 |
| 1415 | 13.0 | 2.0 | 1983.0 | 1986.0 |
| 1540 | 6.0 | 2.0 | 1987.0 | 2006.0 |
| 1474 | 22.0 | 1.0 | 1982.0 | 1982.0 |
| 1770 | 6.0 | 1.0 | 1986.0 | 1986.0 |
| 2115 | 82.0 | 23.0 | 1980.0 | 2012.0 |
| 2275 | 1.0 | 1.0 | 1994.0 | 1994.0 |
| 1909 | 15.0 | 5.0 | 1987.0 | 2013.0 |
Question:
When was the first HC climb before 2013 with more than 3 times visited, more than 4 HC climbs, and a height of 1669?
Answer:
1981.0