XSD For Class C # Enum

I'm generating a class with XSD.EXE from a schema. I am summarizing the posting only the part of the schema that generates the enum that I doubt.

<xs:simpleType name="TCodUfIBGE">
    <xs:annotation>
        <xs:documentation>Tipo Código da UF da tabela do IBGE</xs:documentation>
    </xs:annotation>
    <xs:restriction base="xs:string">
        <xs:whiteSpace value="preserve"/>
        <xs:enumeration value="11"/>
        <xs:enumeration value="12"/>
        <xs:enumeration value="13"/>
        <xs:enumeration value="14"/>
        <xs:enumeration value="15"/>
        <xs:enumeration value="16"/>
        <xs:enumeration value="17"/>
        <xs:enumeration value="21"/>
        <xs:enumeration value="22"/>
        <xs:enumeration value="23"/>
        <xs:enumeration value="24"/>
        <xs:enumeration value="25"/>
        <xs:enumeration value="26"/>
        <xs:enumeration value="27"/>
        <xs:enumeration value="28"/>
        <xs:enumeration value="29"/>
        <xs:enumeration value="31"/>
        <xs:enumeration value="32"/>
        <xs:enumeration value="33"/>
        <xs:enumeration value="35"/>
        <xs:enumeration value="41"/>
        <xs:enumeration value="42"/>
        <xs:enumeration value="43"/>
        <xs:enumeration value="50"/>
        <xs:enumeration value="51"/>
        <xs:enumeration value="52"/>
        <xs:enumeration value="53"/>
    </xs:restriction>
</xs:simpleType>

In class it's getting like this:

Note: Also summarized.

 public enum TCodUfIBGE
 {

    /// <remarks/>
    [System.Xml.Serialization.XmlEnumAttribute("11")]
    Item11,

    /// <remarks/>
    [System.Xml.Serialization.XmlEnumAttribute("12")]
    Item12,

    /// <remarks/>
    [System.Xml.Serialization.XmlEnumAttribute("13")]
    Item13,
 }

Example:

 /// <remarks/>
    [System.Xml.Serialization.XmlEnumAttribute("11")]
    Item11 = 11,

Or else:

public enum TipoPessoa
{
   [System.Xml.Serialization.XmlEnumAttribute("1")]
    Fisica = 1,
   [System.Xml.Serialization.XmlEnumAttribute("2")]
    Juridica = 2
}

EDIT: Is there any way to generate this class with the values for the defined enum items equal to those of the attribute?

Why in an actual application would this be absurd?