Other factors tied to increased autism risk, though to a lesser degree, included congenital malformations, breech and other kinds of abnormal birth positions, multiple birth, a low 5-minute Apgar score, weighing less than 5.5 pounds at birth, umbilical cord complications, fetal distress, being small for gestational age.
SILVER vs CLAD: Some of the Eisenhower Dollars issued between 1971 and 1976 were composed of 40% Silver. These were Special Issues available only from the U. S. Mint which sold them at a premium. Eisenhower Dollars issued for general circulation were Clad: composed of a mixture of nickel and copper. D (Denver): The 'D' mint mark is located on the obverse between the date and Eisenhower's neckline. S (San Francisco): The 'S' mint mark is located on the obverse between the date and Eisenhower's neckline. Note: Dollars struck in Philadelphia bear no mint mark.
Between 2001-2010, they were produced solely at West Point. Starting in 2011, they were struck in both West Point and San Francisco. In terms of annual proof issues, from 1986-1992 the collector proof American Silver Eagle coin was minted at the Mintâs San Francisco facility and included the S mint mark. From 1993 through 2000, they were produced in Philadelphia and featured the P mint mark. Since 2001, Proof Silver Eagles have been minted in West Point and bear the W mint mark. Three American Silver Eagle anniversary products included special one-year only proofs. In 1995 and for the coinâs 10th anniversary, the Mint also produced a limited amount of proofs with a P mint mark.