Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Artist | Country of origin | Period active | Release-year of first charted record | Genre | Claimed sales |
| --- | --- | --- | --- | --- | --- |
| Eagles | United States | 1971–present | 1972.0 | Soft rock / Country rock | 150 million |
| Rihanna | Barbados United States | 2005–present | 2005.0 | R&B / Pop / Dance /Hip-hop | 150 million |
| U2 | Ireland | 1976–present | 1980.0 | Rock | 150 million |
| Billy Joel | United States | 1964–present | 1971.0 | Pop / Rock | 150 million |
| Phil Collins | United Kingdom | 1980–2011 | 1981.0 | Adult contemporary | 150 million |
| Aerosmith | United States | 1970–present | 1973.0 | Hard rock | 150 million |
| Frank Sinatra | United States | 1935–1995 | 1939.0 | Pop / Swing | 150 million |
| Barbra Streisand | United States | 1960–present | 1963.0 | Pop / Adult contemporary | 145 million |
| Garth Brooks | United States | 1989–present | 1989.0 | Country | 130 million |
| Genesis | United Kingdom | 1967–1999 2006–2011 | 1969.0 | Progressive rock / Pop rock | 130 million |
| Donna Summer | United States | 1968–2012 | 1974.0 | Pop / Disco / R&B | 130 million |
| Neil Diamond | United States | 1966–present | 1966.0 | Pop / Rock | 125 million |
| Bruce Springsteen | United States | 1972–present | 1973.0 | Rock | 120 million |
| Bee Gees | United Kingdom | 1963–2003 2009–2012 | 1963.0 | Pop / Disco | 120 million |
| Julio Iglesias | Spain | 1968–present | 1968.0 | Latin | 120 million |
| Dire Straits | United Kingdom | 1977–1995 | 1978.0 | Rock / Pop | 120 million |
Question:
What's the period of a rock album released in 1973?
Answer:
1972–present