| Galwch heibio Caeau Hidlo Yma |
| |
|  Marwolaethau babanod - nifer | Marwolaethau babanod - cyfradd | Marwolaethau newyddenedigol - nifer | Marwolaethau newyddenedigol - cyfradd | Marwolaethau amenedigol - nifer | Marwolaethau amenedigol - cyfradd |
| 1970 | 794 | 18.7 | 544 | 12.8 | 1,099 | 25.5 |
| 1971 | 794 | 18.4 | 529 | 12.3 | 1,066 | 24.4 |
| 1972 | 639 | 16.0 | 433 | 10.8 | 904 | 22.3 |
| 1973 | 615 | 16.4 | 420 | 11.2 | 833 | 21.9 |
| 1974 | 617 | 17.0 | 416 | 11.5 | 778 | 21.2 |
| 1975 | 493 | 14.5 | 351 | 10.3 | 678 | 19.7 |
| 1976 | 457 | 13.7 | 322 | 9.6 | 642 | 19.0 |
| 1977 | 430 | 13.5 | 315 | 9.9 | 575 | 17.9 |
| 1978 | 440 | 13.2 | 299 | 9.0 | 566 | 16.8 |
| 1979 | 447 | 12.4 | 304 | 8.4 | 569 | 15.6 |
| 1980 | 426 | 11.4 | 296 | 7.9 | 483 | 12.8 |
| 1981 | 452 | 12.6 | 292 | 8.1 | 508 | 14.1 |
| 1982 | 378 | 10.6 | 245 | 6.9 | 400 | 11.1 |
| 1983 | 379 | 10.7 | 238 | 6.7 | 405 | 11.3 |
| 1984 | 314 | 8.8 | 204 | 5.7 | 380 | 10.5 |
| 1985 | 362 | 9.8 | 215 | 5.8 | 378 | 10.2 |
| 1986 | 352 | 9.5 | 207 | 5.6 | 384 | 10.3 |
| 1987 | 359 | 9.5 | 190 | 5.0 | 351 | 9.2 |
| 1988 | 294 | 7.6 | 183 | 4.7 | 334 | 8.6 |
| 1989 | 304 | 8.0 | 180 | 4.7 | 318 | 8.3 |
| 1990 | 268 | 6.9 | 152 | 3.9 | 290 | 7.4 |
| 1991 | 250 | 6.6 | 158 | 4.1 | 301 | 7.9 |
| 1992 | 225 | 6.0 | 143 | 3.8 | 263 | 7.0 |
| 1993 | 205 | 5.6 | 125 | 3.4 | 305 | 8.3 |
| 1994 | 208 | 5.9 | 143 | 4.0 | 328 | 9.2 |
| 1995 | 211 | 6.1 | 132 | 3.8 | 272 | 7.8 |
| 1996 | 195 | 5.6 | 126 | 3.6 | 264 | 7.5 |
| 1997 | 204 | 5.9 | 135 | 3.9 | 275 | 7.9 |
| 1998 | 189 | 5.7 | 122 | 3.6 | 269 | 8.0 |
| 1999 | 207 | 6.4 | 131 | 4.1 | 252 | 7.8 |
| 2000 | 163 | 5.2 | 112 | 3.6 | 229 | 7.3 |
| 2001 | 169 | 5.5 | 105 | 3.4 | 231 | 7.5 |
| 2002 | 142 | 4.7 | 95 | 3.1 | 235 | 7.7 |
| 2003 | 129 | 4.1 | 94 | 3.0 | 238 | 7.5 |
| 2004 | 165 | 5.1 | 106 | 3.3 | 264 | 8.1 |
| 2005 | 139 | 4.3 | 94 | 2.9 | 241 | 7.4 |
| 2006 | 137 | 4.1 | 93 | 2.8 | 233 | 6.9 |
| 2007 | 182 | 5.3 | 116 | 3.4 | 252 | 7.3 |
| 2008 | 147 | 4.1 | 108 | 3.0 | 241 | 6.7 |
| 2009 | 166 | 4.8 | 107 | 3.1 | 260 | 7.4 |
| 2010 | 144 | 4.0 | 102 | 2.8 | 271 | 7.5 |
| 2011 | 140 | 3.9 | 97 | 2.7 | 236 | 6.6 |
| 2012 | 146 | 4.1 | 103 | 2.9 | 258 | 7.3 |
| 2013 | 122 | 3.6 | 82 | 2.4 | 209 | 6.2 |
| 2014 | 123 | 3.7 | 80 | 2.4 | 242 | 7.2 |
| 2015 | 123 | 3.7 | 82 | 2.5 | 219 | 6.5 |
Marwolaethau ymhlith babanod, babanod newydd-anedig a marwolaethau amenedigol yn ôl blwyddyn
