Disneyland ticket prices have skyrocketed more than 5,000% since the Anaheim theme park opened in 1955, according to a new study.

A study from the United Kingdom-based Play Like Mum mommy blog looked at the rising costs of admission tickets over the past six decades at Disney theme parks around the world.

Disneyland admission cost $2.50 in 1955 compared to a $129 “regular” park ticket today, an increase of 5,060%, according to the study. Disneyland admission today costs more than 50 times as much as it did on opening day, the study found.

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Disneyland officials said the experience from 64 years ago cannot be compared to today’s resort that includes two theme parks, three hotels and an outdoor shopping mall.

“Our pricing reflects a full-day of family entertainment with world-class attractions and experiences,” Disneyland officials said in a prepared statement. “Over time, our pricing model has evolved, providing guests with a variety of ticket offerings to meet their needs, while helping us to spread visitation, better manage demand and deliver a great experience, like our new 14-acre Star Wars: Galaxy’s Edge.”

Adjusting for inflation, the $2.50 ticket from 1955 would cost $23.89 in 2019 dollars, an increase of 440% from Disneyland’s opening to today.

The study used Disneyland’s current $129 “regular” price ticket for comparison. Disneyland’s lowest-priced $104 off-peak “value” ticket represents a 4,060% increase compared to the 1955 ticket price. Adjusted for inflation, today’s value ticket represents a 335% increase compared to 1955.

The 1955 Disneyland admission price was based on an adult “Deluxe 15” ticket book that included admission to the park and 15 attractions.

By the park’s 10th anniversary, Disneyland’s prices rose to $7.30 and remained at that level through the 20th anniversary, the study found.

In the summer of 1981, Disneyland began offering an all-inclusive ticket with unlimited access to the theme park’s attractions as an alternative to the traditional booklet with A- to E-tickets. The next summer, the ticket books were phased out completely.

Disneyland ticket prices rose steadily to $16.50 in 1985, $31 in 1995, $56 in 2005 and $99 in 2015, according to the study.

Of course, Disneyland has changed since 1955. Back then, there was only one theme park with 33 attractions that were individually priced and accepted lettered tickets from a booklet. Today, Disneyland has tiered pricing that offers access to 56 attractions with a single admission ticket. Since 1955, Disneyland has added entire themed lands — including New Orleans Square, Critter Country, Mickey’s Toontown and Star Wars: Galaxy’s Edge. In 2001, the separate-admission Disney California Adventure opened in the former Disneyland parking lot.

The study found that admission prices have risen steadily at Disney theme parks around the world. Magic Kingdom ticket prices have increased more than 3,000% since the Florida park opened in 1971 at Walt Disney World, according to the study. Admission prices are up 76% at Tokyo Disneyland since 1983, 140% at Disneyland Paris since 1992 and 83% at Hong Kong Disneyland since 2005, the study found.

Disneyland raised prices in January on single- and multi-day tickets as well as annual passes ahead of the grand opening of Star Wars: Galaxy’s Edge.