Table 12: Trends in levels of dental caries in 12-year-olds
mean [number of] delayed, missing, filled permanent teeth (DMFT) per person aged 12 years [as a result of carries]
| Country or area |
Year |
DMFT |
Year |
DMFT |
Year |
DMFT |
| DMFT, decayed, missing, filled permanent teeth. |
| Industrialized countries |
| Australia |
1956 |
9.3 |
1982 |
2.1 |
1998 |
0.8 |
| Finland |
1975 |
7.5 |
1982 |
4.0 |
1997 |
1.1 |
| Japan |
1975 |
5.9 |
1993 |
3.6 |
1999 |
2.4 |
| Norway |
1940 |
12.0 |
1979 |
4.5 |
1999 |
1.5 |
| Romania |
1985 |
5.0 |
1991 |
4.3 |
1996 |
3.8 |
| Switzerland |
1961-1963 |
9.6 |
1980 |
1.7 |
1996 |
0.8 |
| United Kingdom |
1983 |
3.1 |
1993 |
1.4 |
1996-1997 |
1.1 |
| United States |
1946 |
7.6 |
1980 |
2.6 |
1998 |
1.4 |
| Developing countries |
| Chile |
1960 |
2.8 |
1978 |
6.6 |
1996 |
4.1 |
| Democratic Republic of the Congo |
1971 |
0.1 |
1982 |
0.3 |
1987 |
0.4-1.1 |
| French Polynesia |
1966 |
6.5 |
1986 |
3.2 |
1994 |
3.2 |
| Islamic Republic of Iran |
1974 |
2.4 |
1976 |
4.9 |
1995 |
2.0 |
| Jordan |
1962 |
0.2 |
1981 |
2.7 |
1995 |
3.3 |
| Mexico |
1975 |
5.3 |
1991 |
2.5-5.1 |
1997 |
2.5 |
| Morocco |
1970 |
2.6 |
1980 |
4.5 |
1999 |
2.5 |
| Philippines |
1967 |
1.4 |
1981 |
2.9 |
1998 |
4.6 |
| Uganda |
1966 |
0.4 |
1987 |
0.5 |
1993 |
0.4 |
Source: WHO/FAO "Diet, Nutrition and the prevention of chronic diseases"
Section 5.6.2 Trends 
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