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:
| Name | Canton | Height (meters) | Crest length (meters) | Type | Year of construction | Name of the Lake |
| --- | --- | --- | --- | --- | --- | --- |
| Grande Dixence | Valais | 285.0 | 695.0 | Gravity | 1961.0 | Lac des Dix |
| Mauvoisin | Valais | 250.0 | 520.0 | Arch | 1957.0 | Lac de Mauvoisin |
| Luzzone | Ticino | 225.0 | 600.0 | Arch | 1963.0 | Lago di Luzzone |
| Contra (Verzasca Dam) | Ticino | 220.0 | 380.0 | Arch | 1965.0 | Lago di Vogorno |
| Emosson | Valais | 180.0 | 555.0 | Arch | 1974.0 | Lac d'Emosson |
| Zeuzier | Valais | 156.0 | 256.0 | Arch | 1957.0 | Lac de Tseuzier |
| Göscheneralp | Uri | 155.0 | 540.0 | Embankment | 1960.0 | Göscheneralpsee |
| Curnera | Graubünden | 153.0 | 350.0 | Arch | 1966.0 | Lai de Curnera |
| Zervreila | Graubünden | 151.0 | 504.0 | Arch | 1957.0 | Zervreilasee |
| Moiry | Valais | 148.0 | 610.0 | Arch | 1958.0 | Lac de Moiry |
| Gigerwald | St.-Gallen | 147.0 | 430.0 | Arch | 1976.0 | Gigerwaldsee |
| Limmern | Glarus | 146.0 | 375.0 | Arch | 1963.0 | Limmerensee |
| Valle di Lei | Graubünden | 141.0 | 690.0 | Arch | 1961.0 | Lago di Lei |
| Punt dal Gall | Graubünden | 130.0 | 540.0 | Arch | 1968.0 | Lago di Livigno |
| Sambuco | Ticino | 130.0 | 363.0 | Arch | 1956.0 | Lago del Sambuco |
| Nalps | Graubünden | 127.0 | 480.0 | Arch | 1962.0 | Lai da Nalps |
| Hongrin Nord | Vaud | 125.0 | 325.0 | Arch | 1969.0 | Lac de l'Hongrin |
| Gebidem | Valais | 122.0 | 327.0 | Arch | 1967.0 | Gebidemsee |
| Mattmark | Valais | 120.0 | 780.0 | Embankment | 1967.0 | Mattmarksee |
| Santa Maria | Graubünden | 117.0 | 560.0 | Arch | 1968.0 | Lai da Sontga Maria |
| Albigna | Graubünden | 115.0 | 759.0 | Gravity | 1959.0 | Albignasee |
| Spitallamm | Berne | 114.0 | 258.0 | Arch | 1932.0 | Grimselsee |
| Cavagnoli | Ticino | 111.0 | 320.0 | Arch | 1968.0 | Lago dei Cavagnöö |
| Schräh | Schwyz | 111.0 | 150.0 | Gravity | 1924.0 | Wägitalersee |
| Oberaar | Berne | 100.0 | 526.0 | Gravity | 1953.0 | Oberaarsee |
Question:
Tell me the total number of crest length for year construction larger than 1957 for mattmark
Answer:
1.0