document.write('');
document.write(' 1970 |');
document.write(' 1970 P2 |');
document.write(' 1970 P3 |');
document.write(' 1971 |');
document.write(' 1972 |');
document.write(' 1973 |');
document.write(' 1974 |');
document.write(' 1975 |');
document.write(' 1975 P2 |');
document.write(' 1976 |');
document.write(' 1976 P2 |');
document.write(' 1977 |');
document.write(' 1977 P2 |');
document.write(' 1978 |');
document.write(' 1978 P2 |');
document.write(' 1979 |');
document.write('');