Rolling a die twice: C

I am trying to write a program, which rolls a die twice using the rand() function in C. My aim is to roll the die 36000 times and find the sum of the two results obtained (from the two die) each time and store the sum (of the two results which lie in the range [2,12]) in an array and display the result using for loop and printf() function.

From the concept of probability I expect the following result:

<table>
<tr>
<th>Sum</th>
<th>No.</th>
</tr>
<tr>
<td>2</td>
<td>1000</td>
</tr>
<tr>
<td>3</td>
<td>2000</td>
</tr>
<tr>
<td>4</td>
<td>3000</td>
</tr>
<tr>
<td>5</td>
<td>4000</td>
</tr>
<tr>
<td>6</td>
<td>5000</td>
</tr>
<tr>
<td>7</td>
<td>6000</td>
</tr>
<tr>
<td>8</td>
<td>5000</td>
</tr>
<tr>
<td>9</td>
<td>4000</td>
</tr>
<tr>
<td>10</td>
<td>3000</td>
</tr>
<tr>
<td>11</td>
<td>2000</td>
</tr>
<tr>
<td>12</td>
<td>1000</td>
</tr>
</table>

Now, this is the code I put

int main(void)
{   srand(3);
    int die1, die2, count, measure[13];
    for(count=0; count<36000; count++){
        die1=1+rand()%6;
        die2=1+rand()%6;
        measure[die1+die2]++;
    }
    printf("Results!\n");
    printf("Sum%20s\n", "Frequency");
    for(count=2; count<=12; count++){
        printf("%3d%20d\n", count, measure[count]);
    }

    return 0;

}

This was the result I got -The result I obtained
From the image, all the values from 2 to 12 are close to the expected values except 6 and 12. For 6 and 12 it shows 4204735 and 11147179 as the values both of which are far more than 36000. I am unable to understand the reason behind this absurd result.