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 / designation | Year of introduction | Country of origin | Primary cartridge | primary user |
| --- | --- | --- | --- | --- |
| Armalite AR-10 | 1957 | United States | 7.62x51mm NATO | Portugal, Sudan |
| Armalite AR-16 | 1950s | United States | 7.62x51mm NATO | Never in active service |
| AR-832 | 1980s | Italy | 7.62x51mm NATO | Never in active service |
| AVB-7.62 | 1990s | Russia | 7.62x54mm | Never in active service |
| Beretta BM59 | 1959 | Italy | 7.62x51mm NATO | Argentina, Italy, Nigeria |
| Cei-Rigotti | 1890–1900 | Italy | 7.62x54mm | Never in active service |
| Calzada Bayo CB-57 | 1957 | Spain | 7.62x51mm NATO | Spain |
| CETME | 1950s | Spain | 7.62x51mm NATO | Spain |
| Charlton | 1941 | Australia New Zealand | .303 British | Australia, New Zealand |
| Chropi rifle | 1975 | Greece | 7.62x51mm NATO | Never in active service |
| FA-MAS Type 62 | 1962 | France | 7.62x51mm NATO | Never in active service |
| Fedorov Avtomat | 1916 | Russia | 6.5x50mm | Russian Empire, Soviet Union |
| FG 42 | 1942 | Germany | 7.92x57mm | Nazi Germany |
| FM57 rifle | 1957 | Sweden | 6.5x55mm | Never in active service |
| FN FAL | 1953 | Belgium | 7.62x51 NATO | Many NATO nations and others |
| FN SCAR-H | 2000s | Belgium United States | 7.62x51mm NATO | United States of America |
| Franchi LF-59 | 1959 | Italy | 7.62x51mm NATO | Never in active service |
| Gordon CSWS | 1972 | Australia | 7.62x51 NATO | n/a |
| GRAM 63 | 1963 | Sweden | 7.62x51mm NATO | Never in active service |
| Heckler & Koch G3 | 1958 | West Germany | 7.62x51mm NATO | Germany , Mexico , many NATO and others |
| Heckler & Koch HK417 | 2005 | Germany | 7.62x51mm NATO | Albania , Mexico , France , Netherlands , others |
| Howa Type 64 | 1964 | Japan | 7.62x51mm NATO | Japan |
| Itajuba Model 954 Mosquetao | Late 40s? | Brazil | .30-06 Springfield | Brazil |
| KAL1 General Purpose Infantry Rifle | 1973 | Australia | 7.62x51 NATO | n/a |
| M1 Garand | 1936 | United States | .30-06 Springfield | United States and many others |
| M14 | 1957 | United States | 7.62x51mm NATO | United States and many others |
| Madsen LAR | 1962 | Denmark | 7.62x51mm NATO | Never in active service |
| MAS 49 | 1949 | France | 7.5x54mm French | France, Syria |
| Model 45A | 1945 | United States | .30-06 Springfield | Never in active service |
| Olin/Winchester FAL | 1957 | United States | 5.56mm T65 Duplex | Never in active service |
| Reider | 1941 | South Africa | .303 British | Never in active service |
| Saiga 308 | 1990s | Russia | 7.62x51mm NATO | Russia |
| SIG SG 510 | 1957 | Switzerland | 7.5x55mm GP11 | Switzerland, Chile , Bolivia |
| SVT-40 | 1938 | Soviet Union | 7.62x54R | Soviet Union |
Question:
How many different years was the name/designation cetme?
Answer:
1.0