strange behavior of vector class

[anonymous12345]

Code :
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class passByValueSucks
{
public :
	passByValueSucks(){}
	passByValueSucks(const passByValueSucks& p) { cout << "copy constructor called o no" << endl ; }
   
	passByValueSucks& operator=(const passByValueSucks& p)
	{
            if (this == &p) return *this;
		cout << "operator = " << endl ;
		return *this;
	}
};

int main(int argc, char* argv[])
{
	passByValueSucks d;
	cout << "test vector " << endl ; 
    vector<passByValueSucks> v ;
	v.push_back(d);
	v.push_back(d);
	v.push_back(d);
	v.push_back(d);

	system("pause");
	return 0;
}

Results :
--------------------------------------------

test vector
copy constructor called o no
copy constructor called o no
copy constructor called o no
copy constructor called o no
copy constructor called o no
copy constructor called o no
copy constructor called o no
copy constructor called o no
copy constructor called o no
copy constructor called o no

Questions :

1) why does the vector call 10 times the copy constructor ?
i would expect at max 4 times.

2) it is an overkill that vector calls copy constructor, ( cost to call normal constructor + copy constructor). Any way to make vector not pass by value but by reference and call delete when all when it gets deleted ? or do i have to create my own vector class.